Volodymyr Korobko
Experienced Telecommunication Specialist
Connecticut. USA
Phone: +1 203 4892912
Email: vladimir.korobko@gmail.com

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Qualification summary
   More than 15 years of experience in telecommunication industry

   With strong telecommunications technological background, later moved to Data Engineering, Data Analytics, Cloud and Containers areas.

   Got good knowledge of markets & trends within Telecommunications, Media & Technology sectors. I am interested in innovative projects involving any forms of convergence of media, technology, telecommunications and Internet

   My professional interests currently areCloud Technologies,Containerization, Data Engineering and Support for innovative telecom projects

   Experienced in design, development, operation and maintenance, presales and post-sales support of the telecommunication networks (fixed & mobile) and software applications

About 9 years experience in USA telecom market, including Telcordia, Ericsson, Verizon and Mobileum with Technical Support, Data engineering and Cloud engineering roles

   Wide work experience and deep knowledge in GSM, UMTS, LTE, Intelligent Networks, Signalling protocols and Value Added Services (VAS) - Certified expert Siemens switching equipment, Siemens OMC-S, Siemens IN, COMVERSE Prepaid Systems, COMVERSE SMSC, COMVERSE Voice Mail, COMVERSE MMSC ...

  • High work ethic and responsibility;

  • Work under pressure;

  • Stress-resistance in critical situations;

  • Analysis of complex situations;

  • Fast, accurate, highly motivated decision making skills;

  • Ability to balance conflicting interest;

  • Huge experienced in customers on site support;

  • Good communication skills;

  • Dedicated teamwork ability;

  • Availability for relocation and extensive travel.

  • Area of strength

    • Oracle Cloud Infrastructure (OCI)
    • Amazon Web Services (AWS)
    • Pivotal Cloud Foundry (PCF)
    • Microsoft Azure

    • Containerization
    • Kubernetes
    • Docker
    • LXC/LXD

    • Telecom Domain
    • GSM, UMTS, LTE
    • Intelligent Networks
    • Messaging: SMSC, Voice Mail, MMS
    • Signaling: CCS7(INAP, MAP, TCAP, CAP, MTP)
    • Roaming: IREG, TADIG, Signaling Troubleshooting

    • Relational Database Management Systems
    • Oracle ver 7.3 - 12.2
    • PostgreSQL
    • MySQL
    • Teradata

    • Telecom Equipment
    • Siemens switching equipment for fixed and mobile networks (EWSD and D900/D1800 respectively)
    • COMVERSE Prepaid System equipment. (SDP DS20/DS25)
    • COMVERSE Messaging equipment (MMU, MSU, DSU etc.)
    • STROM STP (Medio)

    • Operating Systems
    • UNIX (DEC UNIX True 64, SCORE ver 7.3, Sun Solaris 2.x/7), HP Open View, Linux, Windows 95/98/2000/XP, Windows NT

    • Programming Languages
    • Java, Python, Perl, XML, SQL, JavaScript, HTML, CGI, DBI, Oracle PL/SQL, Pascal, ODBC/JDBC

    • Measurement devices
    • GSM/GPRS/IN analyzers: Tektronix K1105/K1297, Anritsu, Agilent, roaming testers and router analyzers.

    Professional experience
    Cloud Solutions Consultant Mobileum
    Danbury, CT. USA
    May 2019 - Present
        Project description (https://raid.cloud/): RAID Rating and Billing Validation (RBV) provides an automated auditing mechanism that simplifies the complex tasks around rating and charging in a multi-partner and multi-price service provider environment. I was part of the team doing Proof of Concept (POC) solution infrastructure design for moving RAID into cloud using multi vendor cloud platforms such as Oracle Cloud, AWS, Microsoft Azure

    Creating and administering Compartments within the Tenancy to enable POC solution design. Placing each POC project into a separate Compartment to allow a better resource management and cost tracking
    Creating multiple Subcompartments within dedicated POC Compartment to further split bigger POC projects into smaller sub-projects and enabling logical separation between them.
    Creating and administering Local Users in OCI IAM Service, Federated Users in identity provider outside OCI IAM service (Microsoft Active Directiory identity provider) and automatically replicating those Federated Users into Provisioned Users in OCI IAM Service.
    Orginizing Users into Groups with permissions to do commonly needed tasks that corresponds specific project teams or roles.
    Writing IAM Policies such as inspect,read,use,manage to allow group of users interact with OCI resources grouped into compartments or tenancy lelel. Using policy inheritence rules to allow subcomprtments inherit policies attached to parent compartments. Using Family Resource-Types Policies such as (all-resources, cluster-family, database-family, dns, file-family, instance-family, object-family, virtual-network-family, volume-family) to aggregate individual resource-types and allow easy administration
    Creating Dynamic Groups to aggregate compute instances to interface with OCI resources and enabling dynamic group members to act as IAM users to provision compute, networking and storage resources based on IAM policies acting on tenancy level, allowing OCI resources behave autonomously, scaling up and scaling down via matching rules .
    Approaching different methods while managing different in nature resources: Global, Regional and AD level resources. Global resoures such as Users, Groups, Compartments and Policies intially can be created only in their home region of tenancy. When changes are made to Global resources, they must be made in home region first and then automatically replicated to other regions. Verify Global resource replication process complete among all regions, before activating Global operations, it make take up to 10 minutes for global resources to be replicated.
    Using Free-form tags to assign key-value pairs to resources used to build demo and proof-of-concept and Defined Tags for enterprise level solutions to enable reporting, filtering, managing, and performing bulk actions
    Managing CIDR, VCN, Route Tables, Security Lists and Subnets to enable Network connectivity between OCI resources. Attaching an Internet Gateway to VCN to allow instances from public subnets to be reached from the Internet. Attaching NAT Gateway to VCN to allow instances from private subnets to reach internet destinations without traversing the internet (for instance to store backup on External OCI Storage). Attaching DRG to VCN to enable Fast-Connect or IPSecVPN while connecting on-prem network to OCI.
    Peering resources within one Region using LPG, and resources from different regions using RPG
    Creating the public Load Balancers to accept HTTP traffic from internet and splitting it between multiple web servers located in different AD and FD. Creating the private Load Balancers to manage TCP traffic between multiple DB instances sitting in the private subnets.
    Creating the Custom Compute Images using Platform Images, adding secondary vNIC to compute instance
    Configure ATP resource managment rules to manage runtime and IO consumption for the customer group of batch process to limit batch process to not interfere with OLTP transactions
    Moving resources between compartments while managing proof-of-concept (POC) solutions
    Creating Pre-authenticated requests (PAR) to let users access a bucket/object without having their own credentials
    Using Export Options to control how NFS clients access file systems when they connect to a mount target (READ, WRITE, READ/WRITE)
    Creating block volumes with read/write shareble option to attach it to multiple instances at a time.
    Using multipart upload to upload the large files (TB in size ) to OCI Object Storage
    Using Security Lists to define a set of security rules that applies to all VNICs in the subnet, and alternatively using Network Security Groups (NSG) to define a set of security rules that applies to a group of any VNIC ( possibly from different subnets) to separate VCN subnet architecture from appication security requirements
    Creating the Load Balancers to serve different types of traffic ( TCP, HTTP session persistent, HTTP non-sticky). Using Round Robin, Least Connections and IP Hash balancer policy to balance the load. Setting backend server to drain connections to disallow all new connections to this server, and waiting till all open connections to this server are completed before turning down this server.
    Updating the Route Table when adding any type of Gateway such as (IGW, NAT, SG, DRG ) to VCN
    Enabling Object Versioning on bucket level to provide data protection against accidental object update, overwrite or deletion.
    Using Object Storage to share resources accross tenancies; using lifecycle rules to archive or delete objects from Object Storage, and using retention rules and Immutable Option for data stored on Object Storage to prevent that data to be deleted
    Using Tag-based Access Control to restrict access to resources

    Environment: Oracle Cloud Ingrastructure (OCI), Amazon Web Services (AWS), Microsoft Azure

    Cloud IaaS Solutions Engineer (AWS) Verizon
    Ashburn, VA. USA
    May 2018 - May 2019
        Project description: Verizon FIOS is a bundled Internet access, telephone, and television service that operates over a fiber-optic communications network with over 6 million customers in nine U.S. states I was part of the team moving on-premises FIOS solution based on MySQL to multiple public vendors like: AWS cloud solution based on Amazon Aurora

    Using AWS Database Migration Service (DMS) to move source MySQL DB into target AWS Aurora DB using one-time approach while leveraging AWS Schema Conversion Tool (AWS SCT) to define Source Endpoint and Target Endpoint
    Facilitating migration by means of deploying several replication EC2 instances specifically adapted to run replication tasks to move source to a target and perform migration process monitoring during the process
    Created endpoints to access source and target data stores (MySQL and Aurora respectively) by defining secure information required to connect to databases (such as username/password and Encryption mode such as SSL) as well as endpoint type, port 3306, public IP address for on-premise source instance and FQDN for AWS target instance; Enabled endpoints to be used by replications tasks
    Doing prerequisites checks before the migration:
    Verify that source host firewall will allow the connections from AWS replication instances using firewall-cmd -list-all command
    Make sure that Amazon Aurora security group that manages access to that instance allows connections from the replication instance by checking an Inbound list and creating a rule that allows connections from the same network that hosts job application instance (protocol TCP, port 3306, source
    Within a previously created VPC create a subnet group where replication instances will be placed in a separate subnets to better control a security of trafic flow between external sources (on-premise MySQL DB) and internal sources (repliction instances)
    Assign a public IP address to newly created replication instance to allow external source DB for replication
    Deploy a Database Migration Service special type of EC2 Replication Instance to previously enabled VPC to manage replication tasks, make those instance highly available to continue your migration when instance in one of the avalability zones would fail by chosing MultiAZ type of instance, so the primary replication instance will be created in one availability zone and standby instance in another AZ
    Create replication tasks by means of associated rules for DB migrartion, so they can identify the source, the target, the type of migration as FULL+CDC and transformation logic that may happen during the migration process as well as list of tables to migrate
    Chosing FULL+CDC (Change Data Capture) type of migration for DB replication will migrate existing data from Source to Target including all existing tables and then migrate the ongoing changes allows our team to migrate the DB for a longer period of time when one-shot migration is not possible or when you need to maintain Source DB and Target DB simultaneously for some time. Selecting FULL+CDC migration type enabled us to stay with Source DB in place until all migration issue on Target DB is resolved
    Configuring additional task settings like: Data Validation feature to compare data on target with source and make sure they are equally same; Table Mapping to change data type and/or schema settings; Filters - to limit data only that we need

    Environment: AWS SCT, UNIX, ORACLE, MySQL, PostgreSQL, AWS DMS, ETL, SQL, PL/SQL, Python

    ETL Data Engineer (for Visualization team) Verizon
    Ashburn, VA. USA
    July 2017 - April 2018

    Involved in requirements gathering for Tableau and AWS Quicksight dashboards development.
    Loaded data to multiple Oracle tables simultaneously using SQL Loader by invoking sqlldr command for bulk-loads data into the database from external files while supporting numerous input formats, including delimited, fixed record, variable record, stream. Utilized data filtering techniques while loading data
    Created new Stored Procedures/Functions/Triggers/Materialized Views/Packages / Simple, Ref & Traditional Cursors / Dynamic SQL / Pipelines / Table functions while transforming data from multiple sources to Oracle
    Handled Oracle Exceptions via using: Built-in error functions; Combining multiple exceptions in a single handler; Propagating unhandled exceptions; Writing WHEN OTHERS handling code
    Developed complex data pipelines using Python, Unix/Linux scripting and SQL to ingest data to Tableau
    Developed Merge jobs in Python to extract and load data into Oracle database using cxOracle library
    To speed up the loading, developed python applications using asynchronous concept
    Wrote Complex Queries like Sub-Queries , Joins, Hierarchical Query, Co-related Sub-Query, Traditional cursor used inside Query, Inline View, Simple/Aggregate Functions, Analytical Functions, to name a few.
    Monitored the Processes /Alert log file/ Trace files on regular intervals as part of maintenance
    Tuned complex SQL Statements used inside Merge statement, Materialized Views, Application and Reports, Optimized & Tuned PL-SQL Procedure/Function/Triggers /Packages.
    Worked closely with Informatica Developer to Tune ETL Queries/Processes.
    Responsible for technical support of applications through implementing predefined SQL/PL-SQL processes.
    Designed, Developed & Implemented ETL processes using TOAD, SQL*Loader, SQL and PL-SQL to meet key project requirements.
    Monitored and optimized the performance of the data pipelines.
    Represented data pipelines by means of Tableau Dashboards to reflect ETL processes on each step
    Collected statistical Information about memory like Shared Pool (Library cache, Dictionary cache), Buffer Caches, Large Pool, PGA to verify the Load during the substantial ETL task execution and tune if needed
    Collected Statistics about the Temporary /Undo and/or Rollback segments to verify the I/O Load while executing complex ETL tasks to adjust the pipeline bottlenecks where it was needed
    Collected Statistics about the Permanent segments to verify the I/O Load, Chained Rows, Migrated Rows, Fragmented Extents so to tune the Performance, remove/avoid row chaining and row migration and to de-fragment the extents and segregating the same / moving to another place if required

    Environment: Tableau Desktop 10.5, UNIX, MySql, Perl, Python, SQL, Data Modeling, Data Warehouse, OLAP

    ETL Team Lead/ Sr. Data Engineer Ericsson
    Piscataway, NJ. USA
    February 2016- July 2017
        Project description: Ericsson Charging System is a modular, scalable, open, single convergent charging system , Pre-integrated with CRM, mediation, provisioning, self-care, policy, catalog and traffic management, it is cloud-ready and cloud-enabled. Key features include: Real-time convergent charging, full mobile broadband charging functionality, Scalable, modular architecture, fully configurable tariff system. Our group of 6 Data engineers has supported this system from Database perspective while managing all the data needed for producing meaningful analytic results about mobile subscribers call records, tariffs, promotions for internal and external users.

    Managing around 20+ applications for ETL while coordinating group of 6 data engineers to facilitate the process
    Understanding the requirement from Business and translating them into Technical requirements and creating specs and related documents.
    Responsible for process orientation in Data mapping, analysis and system design to ensure project is well-designed and compliant to audit requirements
    Utilized expdp and impdb to Export/Import Oracle DB object types including multiple schemas, multiple tablespaces and multiple tables from one Oracle Database to another while achieving high speed supported by proprietary binary format and data filtering capabilities
    Diagnosed and tuned ETL related performance processes for a Marketing Data Warehouse to gauge effectiveness of promotional campaigns for 70+mn subscriber base in Tier 1 carrier
    Assisted marketing team with better segmentation and profiling of 70+mn customer base
    Utilized Perl:DBI + DBD::Oracle as well as Python cx_Oracle packages to fetch data from Oracle DBMS as initial step in creating complex data pipelines for further processing
    Optimized queries and views which connected Oracle database to custom Tableau dashboards to visualize categorized sales, categorized usage and nightly ETL job loads.
    Data modeling with SQL Developer Data Modeler. Defining Entities, Attributes and Relationships. Normalizing tables and defining constraints. Mapping the ER model.
    Performance analysis and tuning of new and existing tables, views, stored procedures and indexes to build better data pipelines for ETL processes
    Writing SQL scripts to find patterns and analyze mobile subscribers behavior during the promotions and marketing campaigns
    Automation of 158 Internal Reports Periodic Execution for Tier 1 carrier per Department
    Creating cumulative reports on daily/weekly/monthly basis to avoid heavy SQL queries on large volume of data.
    Utilized such resources as PL/SQL stored objects in combination with automatic daily running UNIX cron jobs (Bash shell scripts).
    Utilized Telend Open Studio ver 6.x for Extraction, Transformation and Loading (ETL) of data into Data Warehouse and downstream applications from heterogeneous sources

    Environment: UNIX, ORACLE, Perl, Python, Talend Open Studio, ETL, PL/SQL, Data Modeling , Google Sheets

    Senior Data Analyst (Telecom OSS/BSS) Ericsson
    Piscataway, NJ. USA
    March 2012 - February 2016

    Build data pipeline to ingest data from multiple sources/ formatted data sets, and clean unstructured raw data to well formatted structured data into RDBMS (Oracle) for downstream web application usage.
    Cleansing/Validating Data before inserting into Database
    Wrote complex ad hoc SQL queries by utilizing enterprise data to fulfill audit data analysis requirements
    Generate insightful visualization (Tableau), produce filtered data from OLAP system/Data Warehouse to help data scientists and stakeholders understand better existing data quality/ trends to make business decisions.
    Optimize SQL query to avoid heavy impact on the system while running the query :
         Using indexes properly
        Retrieving only the Data that is really needed
        Avoiding functions on the left hand-side of the operator
        Getting rid of correlated subqueries
        Avoiding wildcard characters at the beginning of a LIKE pattern
        Estimating the load with EXPLAIN PLAN before executing the SQL query
    Responsible for ETL in multi-source environment using FTP, Shell Scripts, Oracle SQL*Loader, and external tables.
    Used Java/JDBC to connect to Oracle database to manipulate objects stored in OODBMS directly
    Collaborated with cross-functional teams (marketing, finance, purchasing) on creating and visualizing a new SQL based reports to satisfy end customer needs in reporting
    Used Perl/Python to line strip unstructured text and classify data into groups for analysis
    Created 20+ UNIX shell scripts for automate process of loading data
    Created new database objects like Sequences, Procedures, Functions, Packages, Triggers, Indexes and Views in Development and Production environment using PL/SQL and SQL Developer.
    Responsible for data validation and accuracy so as to deliver end-user reports on a daily basis
    Performed data cleansing, and enabled data validation checks during staging process, before loading data into DW.

    Environment: TL1, UNIX, ORACLE, Data Modeling, Talend Open Studio, ETL, SQL, Tableau, Visualization, Google Sheets

    Technical Support Team Lead Telcordia
    Piscataway, NJ. USA
    March 2010 - March 2012

    Design and implement SS7/IP solutions
    Manage, implement and document network SS7 configurations: OPC (originating Point Codes), DPC (Destination Point Codes), APC (Adjacent Point Codes), Signaling Links, Signaling Link sets, Signaling Routes, Signaling Route sets;
    Work with other internal teams to evaluate the impact of new products and services on the SS7 network
    Consult to establish interconnections between carriers SS7 network infrastructure
    Provide expert-level maintenance and technical support for STP software and peripheral systems within the SS7 network infrastructure
    Engineer translations to support complex routing: screening, cluster routing, MTP routing, and GTT routing in the signaling network
    Lead troubleshooting efforts with clients and partners during deployment, testing, and commissioning of interconnect at Signaling and IP Routing level
    Provide expertise to projects relating to new services/products, including system evaluation and implementation of new network architecture and designs
    Perform advanced troubleshooting and protocol debugs for Network Signaling for various protocols like SS7, SIGTRAN, TCP/IP, UDP utilizing Tektronix performance and Protocol Monitoring tools and solutions
    Analyze and resolve system issues, determine and document problem root cause(s). Performs reason for outage (RFO) analysis on major outages
    Monitor, troubleshoot, and drive resolution to faults in the SS7 network
    Monitor, trend, and perform growth engineering on STP hardware as well as SS7 links to multiples nodes in the network
    Create and maintain detailed documentation and network diagrams of the SS7 network

    Environment: SS7, MSC/VLR, HLR/AC, STP

    MBA Student Class 2009 IEDC Bled School of Management
    Bled, Slovenia
    January 2009 - December 2009

        I won a scholarship from the Business School as outstanding candidate for One-Year Executive MBA program . IEDC as creative teaching institution, provides learning with the world's best professors teamed with top regional experts, and develops managers with the highest professional and ethical standards. IEDC combines high academic and professional excellence, innovative research, and intellectual curiosity of the professors, as well as the ability to communicate effectively with business leaders, which results in mutual support and synergy.
        According to Independent "Bled in Slovenia has the best small business school in Europe."
        Another very authoritative edition Finanancial Times describes IEDC as a Creative Environment for Creative Leadership "IEDC-Bled School of Management in Slovenia has long been a champion of art as a tool in leadership development." Her Majesty Queen Elizabeth II and His Royal Highness, The Duke of Edinburgh, visited IEDC Bled School of Management in 2008, that prove a truly international level of Business School, and role played by IEDC in the region. Combination of these facts just proved my initial intentions to enter this school . More valuable reason to be a student of this school for me was possibibilty for Outstanding teaching with world class professors rather than School Rankings.

    For example :

        - Randy Kudar came to teach us "Accounting and control" from Richard Ivey School of Business, Canada
        - Jose Pons came to teach us "Marketing Management" from IESE, Spain
        - Arshad Ahmad came to teach us "Financial Manafement" from Concordia University, Canada
        - Philip Stiles came to teach us "Leading Through People" from Cambridge Judge Business School, UK
        - Fraser Johnson came to teach us "Operations Management" from Richard Ivey School of Business, Canada
        - Pierre Casse came to teach us "Leading self and others" from Berlin School of Creative Leadership, Germany
        - Andrej Vizjak came to teach us "Competing against scale strategy" from AT Kearney, Germany
        - Salman Mufti came to teach us "IT Management" from Queen's School of Business, Canada
        - Nenad Filipovich came to teach us "Strategic Management" from IEDC, Slovenia
        - Paul King came to teach us "Management Communication" from Wharton University, USA
        - Colin Egan came to teach us "Creating a Customer Cantered Organization" from Warwick Business School, UK

        As a Creative Environment for Creative Leadership, IEDC makes significant efforts in personal and interpersonal skills development especially for Leadership Skills.

        In general IEDC curriculum includes three types of courses: functional courses, strategic and integrative courses, and personal and interpersonal skills courses. All courses, even the functional course, share a common general management perspective, providing ”view from the top” of an organization, and preparing for the uncertainty, complexity, and rapid change that mark the reality of a typical executive.


    Accounting and Control focused me on effective measurement of organizational performance, and helped me become intelligent user of accounting information for decision-making. Topics included reading financial statements, financial accounting and reporting, capital investment decisions, cost management systems, management control systems, and new management accounting.

    Financial Management delivered to me the understanding and tools necessary for financial management. Course topics included profit decomposition, bank lending practices, financial ratio analysis, financial health assessment, financial forecasting, break-even analysis, business planning, discounted cash flow analysis, capital expenditure analysis, introduction to valuation, debt policy, corporate strategy and financial performance, dividend and capital structure policies, leveraged buyouts, financial restructuring, and mergers and acquisitions.

    Leading Through People delivered to me an understanding of emerging people issues and gave me the tools required to respond to those issues. Topics included managing the human relations function, building a corporate culture, selecting and hiring personnel, developing talent, compensating and motivating employees, building human capital, managing for high performance and the role of human resource management in change processes.

    Management of Information Technology introduced me to the effective use of information technology in business and management. This course cuts across the various functions of the organization and positions information technology as part of the strategic infrastructure enabling overall business success. Both the internally- and the externally-focused roles of IT are addressed, the former including management information, corporate resource planning, communications, and operation streamlining, and the latter, sales and marketing issues in particular (B2B and B2C).

    Marketing Management, Part 1 & 2, gave me an analytical framework for the marketing discipline and provided me with powerful marketing tools. Topics included marketing mix, consumer market analysis and segmentation, brand positioning and repositioning, basic principles of pricing, the development and implementation of distribution policies, private labels, marketing communication policies, advertising and promotion, and preparation of marketing budgets for brands. These topics were later taken as a starting point for addressing more complex strategic marketing business issues.

    Operations Management discussed another perspective on the organization: its sum of processes with the clear goal of performance maximization. A broad range of topics included operational strategy, material planning and control systems, demand chain management, outsourcing and strategic sourcing, management of constraints, virtual organizations, and the elements of lean manufacturing and quality. The course included, as a prerequisite for transformation competence, modern project management methods: planning and coordination, fending risk and uncertainty, project stakeholder management, new organizational structures and learning from projects.


    The Arts and Leadership course is a collection of lectures and discussions with prominent artists and thinkers. The objective of this course was to raise awareness among participants of the arts as a source of reflection, inspiration and motivation for management and creative leadership, as well as to offer fascinating parallels between the worlds of the arts and business.

    The Business and Society course overviews strategies for effective business and society relationships, with a specific focus on sustainable business strategy as a means of assuring sustainable long-term value creation for business and society. I've been taught approaches and frameworks regarding business-in-society strategy, fundamentals of business sustainability, tools and mechanisms for creating sustainable value, and the most interesting cases of sustainable business development worldwide.

    Business Ethics and Corporate Governance taught me how to maintain ethical standards, and how to apply principles of corporate governance. In addition to other leadership topics addressed in various courses throughout the Program, this course included ethics in relation to an organization’s stakeholders, rules and codes governing the relationship between an organization and its stakeholders, and ethical challenges faced by business leaders engaged in leading business transformations.

    International Political Economy introduced me to the workings of the global economic, social and political environment in which businesses operate. Topics discussed include the role of government in the economy, price stability, full employment, economic growth, monetary policy in theory and in reality, influence and behavior of central banks and currency boards, competition policy and regulation in order to paint “the big picture” of the international business arena, which has become a very complex and uncertain place.

    Leading Self and Others offered a different way of viewing the issues of managing and leading: the Leadership Point of View, which means seeing a situation in all its scope & complexity from the perspective of a person who wishes make a difference by understanding the underlying forces that affect a situation so as to act effectively.

    Strategic Management introduced me to the theory and practice of achieving sustainable competitive advantage. Topics included formulating and implementing a competitive strategy, strategy paradoxes, competition and collaboration, market positioning and the competences required, managing growth, strategic coordination and adapting to a changing environment, and corporate transformation.

    Strategic Management Toolbox equipped me with the frameworks and tools needed for various forms of strategic analysis. In particular, I learned how to analyze a certain industry, how the business environment impacts strategic thinking and what issues should be taken into account when leading for sustainable competitive advantage. This is complemented with techniques which facilitate better understanding of the internal situation in a company. Practices used by professional consultants are observed, and made me more effective in my MBA project work.


    Electives Week offered an opportunity to choose two courses out of a list of seven options, and spend more time with a topics I am most interested in. Traditionally, electives cover in-depth study of foundational courses, such as finances or marketing, or topics of strategic interests that might be interesting to a particular group, such as entrepreneurship or organizational design.

        I chose course "Building and managing high performance teams" held by Dr. Philip Stiles from Cambridge Judge Business School, UK. This elective delivered to me the insights of building high performance teams through focusing on state of the art research and practice to unlock the black box of team composition and team dynamics. The elective explored the area of leading high performance individuals in a team setting. Managing such individuals and ensuring they bring their talents to bear for the good of the team, is a crucial and fascinating management challenge. The programme was also highlighted issues of leading teams with individuals below elite level, who are highly important to the organization yet who require rather a different management approach than the 'A' players. How to resolve conflict in teams and demonstrate effective leadership in teams were also a key elements of this course. The programme thus provided the opportunity for me to hear the latest thinking on these topics and to develop the implications of the work for my own organization.

        Another interesting course I chose was "Financial Markets" held by Dr. Drasko Veselinovic. I've looked at the financial markets, their mechanisms and in particular the regional specifics, from corporate finance perspective. I've got background for the decisions related to financial markets.


    The Experienced Leaders’ Mentorship Program allowed me to harvest the years of practical business experience of top managers in Central and Eastern Europe via individual face-to-face mentoring sessions organized throughout the MBA program. I've been matched with a mentor with relevant interests, industry background, and expertise in order to accelerate my personal development. I was lucky and had been assigned to CEO of Iskratel.

    Leadership Skills workshops focus on practical issues related to leading others and oneself. Therefore they deal with topics such as the essentials of team effectiveness, team dynamics, team roles, and stages of team development. They also address the need to adjust personal leadership style to different situations, as well as make the participants more aware of the need to understand and manage own priorities.

    The Management Communications and Psychological Aspects of Communication course is based on three interrelated themes: structuring effective communications, in particular presentations as streams of messages; the need and ability to persuade the audience; and the use of management communication as a crisis resolution tool. In order to prepare me to be successful and effective in this area the relevant psychology of human behavior was also explored.

    Personal development sessions were dedicated to my individual personal development over the whole program. Scheduled at the beginning and towards the end of the program, they are designed to serve as points of reference in assessing and reflecting on my own current leadership and managerial practices, and offered support in designing a plan to build on strengths and overcome weaknesses.


    High speed, ever-changing circumstances, and constant demand for new solutions define business reality today. Experience and professional knowledge alone are not enough to face these challenges successfully. To constantly adapt and respond to business demands, we need a deeper source of inspiration. IEDC uses art as a platform for leadership development: it inspires exploration and enhancement of the sources of personal inspiration and creativity. At IEDC I worked with artists who were able to transmit lessons of creative leadership through art. By making artistic experiences relevant, I've been invited to think more deeply and thereby opened new creative channels for innovation in an era of rapid change.


    Project work was a cornerstone of my MBA Programs and played an important role in the learning process. As a part of my MBA Program, I worked in team as consultant to the top management of Coca-Cola Hellenic Bottling Company, providing real value to them. The objectives of this project were to enhance the practical side of the learning process, to internalize managerial concepts, and to develop creative and applicable solutions. Applying recently-acquired management concepts and skills, me and my group conducted the project in several stages with the ultimate goal of providing an applicable solution to the organization. The project work started with a systematic analysis of the industry and of the company itself, to determine its competitive positions and identify priorities and areas of possible improvement. We were focused on one particular strategic issue, analyzed in depth, developing alternative solutions to the identified problems, and creating a managerial implementation plan.

    Environment : A.T. Kearney Management Consultants for projects, World Class Professors, Modern Facilities, Library
    Atmosphere  : Social Events, Possibility to relax on Wonderful Bled Lake

    SS7 Signaling Group Team Leader at MTS (NYSE:MBT) MTS
    Kiev, Ukraine
    September 2005 - December 2008
        I worked at Mobile TeleSystems (MTS) - biggest national mobile operator, and was assigned as Leading Engineer in Operation and Maintenance Group responsible for SS7 Signalling for entire mobile network. We were doing signaling traffic redistribution, monitoring and measurement

    Creating signaling connections between two MSC/VL with subsequent SS7 tracing of applications such as: Mobile Terminating Calls (MTC); Inter-MSC Handover; Location Update;
    Creating signaling connections from MSC/VLR to HLR/AC with subsequent SS7 tracing of applications such as: Mobile Terminating Calls (MTC); Location registration; Request for authentication triplets; Call completion to busy subscriber (CCBS);
    Creating signaling connections between HLR/AC and SGSN with subsequent SS7 tracing of applications such as: A GPRS subscriber is roaming into the service area of a new SGSN; The HLR sends authentication triples received from the AC and mobility data to the SGSN.
    Creating signaling connections between MSC/VLR and SGSN with subsequent SS7 tracing of Gs interface to confirm location information of MS attached properly to both GSM and GPRS services while testing combined paging and location update in the MSC/VLR via SGSN
    Creating signaling connections between two HLR/ACs with subsequent SS7 tracing supplementary services like "Follow me"
    Creating signaling connections between MSC/VLR and BSC with subsequent SS7 tracing of services such as paging
    Creating signaling connections between MSC/VLR and PSTN switching center with subsequent SS7 tracing of ISUP and CCBS
    Managing Message Transfer Part (MTP) database on all 26 MSC/VLR within PLMN including the following:
        creating Own Signaling Point Codes (OPC) for NE with CRSIGPOINT, CRC7USER, ENTRC7TGREL commands;
        creating multiple OPC arbitrarily distributed among the networks the node belongs to for one NE with CRSIGPOINT, CRSIGSEC, CRSIGPSECE commands
        creating signaling end points (SEP) and signaling transfer points (STP)
        administering MTP screening functions by creating OPC/DPC combinations within screening table via CRSCRTABLN command
        administering message length screening on link set via Maximum MSU length with CRSIGLSET and MODSIGLSET commands
        creating Signaling Destination Point Codes, Signaling Routes (CRSIGROUTE), Signaling Link Sets and Signaling Links
        enabling load sharing within Singling Link sets and between signaling link sets (within the signaling route set)
        administering SS7 User Parts per NE such as: SCCP, MAP, BSSAP, etc
        administering SCCP Routing per NE for mobile specific applications (location update, interrogation) and for IN-specific applications
        administering SCCP subsystems per NE such as: MAP HLR SSN 6; MAP VLR SSN 7; MAP MSC SSN 8; Serving GPRS Node SSN 149; BSSAP SSN 254; etc
        SCCP management with Red Book, Blue Book, White Book
        Managing Global Title Translation (GTT) per NE which include the following: Global Titles (GT) - translation type (TTID), Numbering Plan (NP), Nature of Address (NA); Global Title Translation destination - SPRNS, SPENS, SPENSSN, SPGTTRL; Subsystem Group; SCCP Group; Retranslation

    Environment: STROM GMSC, STROM STP, Siemens HLRs and VLRs, Alcatel VLRs, ISC

    SMS Support Engineer at COMVERSE (NASDAQ:CMVT) Comverse
    Kiev, Ukraine
    September 2004 - September 2005

    Complex commissioning from initial state - up to turnkey level including commissioning, launching, troubleshooting, and maintenance of COMVERSE Short Message Service Center (SMSC)
    Part of 24x7 support group for CIS & international customers for level 2 & 3 support to provide industry standard service availability in accordance with SLA
    Active interaction with messaging QA and development group for customers reported protocol related issues, new features implementation, new software and patch implementation and MOP review for maintenance schedules.
    Utilizing Tektronix k1205 protocol analyzer for tracing SMS call flow in SS7 MAP protocol and troubleshooting SMS MAP protocol related issues to find out the root cause for cases such as: no paging response via the MSC; IMSI detached; roaming restriction; deregistered in the HLR for non GPRS; MS purged for non GPRS; no paging response via the SGSN; GPRS detached; deregistered in the HLR for GPRS; MS purged for GPRS; Unidentified subscriber via the MSC; Unidentified subscriber via the SGSN; deregistered in the HSS/HLR for IMS; no response via the IP-SM-GW; the MS is temporarily unavailable
    Provide technical & commercial support all along the pre-sales cycle.
    Messaging RFI/RFQ response, clarifications, and negotiations. (SMSC and Voice Mail)
    Working closely with Comverse R&D to implement processing of Supplementary Service operations in combination with SMS teleservices TS21 and TS22 such as: BAOC, BOIC, BOIC-exHC, BIC, BIC-Roam
    SMSC equipment functionality (Boards and Shelves) and product failures analysis.
    Acting as QA while testing/validating functionality of Short Message Service Elements such as: Validity Period; Service-Centre Time Stamp; Protocol Identifier; More Messages to Send; Priority; Messages-Waiting; Alert-SC; MT Correlation ID;
    Execution of ISU (In service Upgrades) and System Migration, Extensions and Software Updates for Messaging Live-Traffic systems (SMSC and Voice Mail)
    Configuring Reply Path feature in SMSC for multiple customers worldwide who would wish to change their default Mobile Stations reply procedures stored in SMSC. The main purpose of this job is to specify how the MS selects the Service Centre for delivering MO SM.
    Lab and field trials, designing and implementing test cases, diagnostic of SMSC equipment faults.
    Problems determination up to design level and translating back to R&D engineering and PM.
    Supervising the process of putting Network Elements (NE) connected with SMSC into customers operation, verification of integration activities.
    Global technical support in interaction with assigned clients. Post sales technical assistance. Providing assistance for customer inquiries concerning system hardware and software functionality.
    Working in steady contact with product management and sales management departments.
    Preparation product draft documentation and SLA per customer.
    Integration of application on the customer site, preparation an introduction and presentations for sales and product management departments.
    Co-ordination with overseas support team responsible for periodic maintenance and implementation of new releases for production platform.
    KPI and messaging performance review with customers using proprietary reporting tools.

    Environment: Ericsson GSM equipment, Cisco routers, CAJUN routers, UNIX SCO Ver 7.3 , DEC UNIX True 64, Perl, Unix Shells, Oracle, Windows; Network analyzers and testers

    VAS Engineer (SMSC & Voice Mail) UMC
    Kiev, Ukraine
    August 2003 - August 2004

    Operation & Maintenance of Short Message Service Centre (Comverse SMSC) which handles UMC nationwide SMS peer-to-peer traffic and Value Added Services
    Defining Access codes for VAS and Premium content providers in Comverse SMSC
    Managing SS7 signalling traffic (MAP protocol) at Siemens MSC, Siemens HLR and Comvesre SMSC while rerouting SMS traffic
    Balancing MO FORWARD-SM SMS traffic on all SS7 links between Comvesre SMSC and Siemens MSCs
    Authored a new signalling traffic distribution method between Comverse SMSC and core network elements such as MSC and HLR by introducing a direct SS7 links between SMSC and HLR to enable Send Routing Info (SRI) messages exchange directly between HLR and SMSC bypassing MSC
    Performing live SMSC upgrades by changing SMSC HW/SW to newer model while keeping main SMSC configuration parameters such as SMSC Service Number in place and changing Global Title Translation (GTT) to new SMSC Signalling Point Code (SPC)
    Administering External Short Message Entities (ESME) within SMSC to enable SMPP ver3.4 messages such as sumbit_sm, data_sm, query_sm, cancel_sm, replace_sm to be sent from ESME toward SMSC and messages like deliver_sm, data_sm to be sent from SMSC to ESME
    Configuring properly SMPP Timers such as (session initiation timer, session timer, inactivity timer, transaction timer) to ensure efficient exchange of SMPP transactions between ESME and SMSC
    Using message simulator for SMPP PDU testing of send/response messages between SMSC and ESME
    Loading all SMS CDR from Comverse SMSC into internal Data Warehouse for further processing and complex SQL analysis
    Analysing Failed Short Message delivery on daily basis by classifying failed SMS_DELIVER_REPORT reports such as Unknown subscriber, Teleservice not provisioned, Call barred, Facility not supported, Absent subscriber, Memory Capacity Exceeded etc and working on elimination the root cause for each group
    Participating in designing, developing, configuring and testing of new services based on SMPP such as SMS and Internet Electronic Mail interworking, etc. For example each MS had been given a chance to receive SMS via email in format 38050xxxxxxx@sms.umc.ua
    Optimizing SMS usage during big spikes of SMS traffic (for example New Year) by disconnecting some internal ESME such as Mobile Call Alert (MCA) platform; converting Store and Forward Engine (SFE) into Forward and Store Engine (FSE)
    Coordinating efforts with Comverse technical support during service outages, assisting them with service restoration by fixing issues from core network side (MSC and HLR)

    Environment: Ericsson GSM equipment, Cisco routers, CAJUN routers, UNIX SCO Ver 7.3 , DEC UNIX True 64, Perl, Unix Shells, Oracle, Windows; Network analyzers and testers

    Operation & Maintenance Engineer GSM (MSC) UMC
    Kiev, Ukraine
    August 2000 - August 2003

    Troubleshooting core Network connectivity issues while handling customer call-flow related complaints
    BSC Rehomes on MSC (rearranging BSC's among MSC's to address uneven network growth and optimization concerns)
    Connecting MSC to partner's PLMN and PSTN while managing SS7 point codes
    Administering Cells and Location Areas (LA) in MSC/VLR: Location Area Code (LACOD), Cell Identification (CI), Global Cell Identification (GCI), Location Mark Number (LMN) and Location Number (LOCNO)
    Using LACOD that belongs to one MSC as input for creating translation procedures for Paging, Searching, Location Updates and Inter-MSC handovers in that particular MSC
    Using a combination of LACOD and CI within one MSC as input for creating translation procedures for Intra-MSC handover, Emergency Calls on the basis of the Location Mark Number (LMN), cell-oriented routing and IN services
    Analysing the age of location information in VLR database by fetching the time of last radio contact
    Creating regional roaming restrictions in VLR database to restrict some roaming partners to use specific areas within our PLMN
    Managing the database of specific numbers within the MSC/VLR such as police, ambulance, emergency, etc. for each city/town/village to enable cell oriented routing for mobile subscribers
    Establishing agreements and maintaining both way process with national mobile providers to enable National Roaming between local mobile operators within the country
    Configuring Mobile Local Calls (MLC) database within MSC
    Administering Mobile Subscriber Data in the VLR such as IMSI attach/detach and cancellation of mobile subscribers in the VLR
    Monitoring VLR database size, purging mobile subscribers from VLR if necessary
    Configuring Origin-Dependant Routing using origination mark ORIG1
    Assigning traffic types to all codes used within MSC such as national and international traffic, emergency calls, INTNAT, NAT1, NAT0, etc
    Managing code points leading to pseudo destination areas using MINMAX parameter
    Creating Code Points for Intra-PLMN interrogation that include digit sequence up to and including HLRID to identify the HLR of the called subscriber
    Creating Code Points for Inter-PLMN interrogation that include MCC and NDC to identify the HLR of the called subscriber
    Creating Code Points for Mobile Terminating Traffic and Handover for following combinations of Applications and Traffic Types (MSRN+MOBTERM, HOB+MOBHAND, BOTH+MOBBOTH)
    Creating Code Points for Cell-Oriented routing with traffic type MOBPROV
    Creating Code Points for CAMEL and IN Services
    Creating Destination Areas (DA) with Standard Routing, Repeat/Modified Digit Translation, Carrier Quotas, Transmission-Optimized Routing
    Creating Internal Routing and Routing via other carriers in MSC
    Administering Trunk Groups, Announcement Groups and Announcement Lines on MSC and Nailed-Up Connections in Switching Network (SN)

    Environment: Siemens SSS equipment, COMVERSE SMSC, Cisco routers, COMVERSE Voice Mail, SUN Solaris, HP-UX 10.20/11.0, Perl, HP Open View 6, Unix Shells, Oracle, Windows; Network analyzers and testers: Tektronix K1105/K1297 and Anritsu analyzers.

    Roaming Interconnect Engineer (GSM) UTEL
    Kiev, Ukraine
    May 1996- April 1998

    Executing TADIG tests based on the following IREG tests:
        IR.24 (typically voice and SMS services)
        IR.35 (GPRS/data services)
        IR.32 (CAMEL services)
        IR.38 (LTE services)
        remaining IREG tests (e.g. IR.50, IR.60, etc.)
    End to end validation of the test results
        Validation of the IREG test sheet in order to ensure that each IREG test case was carried out in line with the aim of the given test
        Validation of the resulted TAP records
    against the applicable TD.57 version
    against the applicate IOT (AA.14 or discount agreement)
    Discussing any deviation with the IREG tester or with the roaming partner, asking for re-test if needed
    Carrying out the validation of the re-test results
    Preparing a validation report of the TADIG test results
    Managing the communication with the IREG testers and roaming partners throughout the whole testing process
    Running SQL analytics to find out discrepancies between partners interconnect data

    Environment: MSC/VLR, HLR/AC, PLMN, IREG, TADIG, Oracle Data Warehouse, Network analyzers and testers: Tektronix K1105.

    Professional development and training
    2009 Master of Business Administration, IEDC Bled Business School of Management www.iedc.si, (Slovenia, Bled).
    2007 NetCracker , Advanced User training. (Ukraine, Kiev).
    2006 Switching equipment deployment , STROM telecom. (Germany, Dusseldorf)
    2004 RTBS (Pre-Paid) 4.250 Platform Support, COMVERSE Systems Ltd.(Israel, Telaviv)
    2003 TRILOGUE Infinity III O&M Part 2, COMVERSE Systems Ltd. (United Kingdom, London)
    2003 IN Service Administration and Customization Enhanced V6,7b, Siemens GmbH. (Austria, Viena)
    2003 IN Platform Operating Advanced V6, V7b , Siemens GmbH. (Austria, Viena)
    2002 ServiceXpress System Administration,Siemens Ukraine. (Ukraine, Kiev)
    2002 ORACLE Enterpprise DBA Part 1A: Architecture and Administration. (Ukraine, Kiev)
    2001 Assisting IP Course, Tecnomen. (Ukraine, Kiev)
    2001 Solaris2.X for System Administrator, Siemens Gbmh. (Germany, Munich)
    2001 IN Service Specific V6, V7b: VPN for UMC, Siemens Gmbh. (Austria, Viena)
    2001 Introduction to Oracle: SQL and PL/SQL. (Ukraine, Kiev)
    2000 Delta Prepaid Service 4F/5E, Siemens Gmbh. (Austria, Viena)
    1998 INSCPOP - IN Service Control Point Operation, Siemens Gmbh. (Germany, Munich)
    1998 INSMPOP - IN Service Management Point Operation, Siemens Gmbh. (Germany, Munich)
    1998 Upgrade Training to OAM Specialist SSS, Siemens Gmbh. (Germany, Munich)
    1998 MN1721 Training for OAM Technician SSS, Siemens Gmbh. (Germany, Munich)
    1998 O&M Specialist for EWSD at MKM Training Center. (Ukraine, Vishgorod)

    IEDC-Bled Business School of Management.   Bled, Slovenia   www.iedc.si Jan 2009 - Dec 2009
    Genral Management Faculty ,
    Master of Business Administration (MBA)
    with GPA 4.0

    see diploma
    National Telecommunication Institute. Kiev, Ukraine 1996-1997
    Switching Faculty ,
    Telecommunication Specialist
    with GPA 4.47 ( max - 5.00 )

    see Diploma
    National Telecommunication Academy of Ukraine. Odessa, Ukraine 1992–1996
    Switching Faculty ,
    Bachelor of Telecommunication
    with GPA 4.87 ( max - 5.00 )

    see Diploma

    NetCracker : Advanced User Training
    COMVERSE University Certificate : Tier 3 for RTBS 4.250
    TRILOGUE Infinity III O&M Part 2, COMVERSE Systems Ltd.
    IN Service Administration and Customization Enhanced V6,7b
    IN Platform Operating Advanced V6, V7b
    ServiceXpress System Administration
    ORACLE Enterpprise DBA Part 1A: Architecture and Administration (first level certificate)
    Assisting IP Course
    Solaris2.X for System Administrator
    IN Service Specific V6, V7b: VPN for UMC
    Introduction to Oracle: SQL and PL/SQL
    Delta Prepaid Service 4F/5E
    INSCPOP - IN Service Control Point Operation
    INSMPOP - IN Service Management Point Operation
    MN1721 Training for OAM Technician SSS + Upgrade Training to OAM Specialist SSS
    O&M Specialist for EWSD