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Engineer Active Directory

Hillsboro, OR
March 09, 2018

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Igor Demchenko

Portland, OR, tel.:650-***-****,


Proven ability to analyze existing systems and schedule upgrades to increase performance and productivity.

Experience testing large scale web-based distributed applications on containers such as Apache/Tomcat, JBoss, Web Logic, and Web Sphere in a Linux production environment running MySQL and Oracle.

Performance and stress testing tools and approaches for driving realistic customer simulations

Manage release branches and deployments in various environments.

Proven Linux skills: including system administration, script development, file system management, searching/finding files.

Knowledge of Data-Center core infrastructure, strong understanding of switching systems, mail, cabling, fiber optics.

Created supporting documentation for systems and software usage and control.

Good team player with solid attention to detail, and the ability to work well in a collaborative team environment.

Exceptional consulting and mentoring skills and learning capacity.

Experience in software installations and configuration on different operating systems.

Excellent troubleshooting skills including telephone and remote support.

Experience with concurrency, multithreading, and the deployment of distributed system architectures.

Excellent problem solving skills combined with best performance under pressure.

Proven ability to work unsupervised and supervise the work of others.

Enthusiastic, efficient, quick learner; able to adapt to new environments and tools easily.

Strong problem-solving and analytical skills with an aptitude and passion for learning new technologies.

Background with test and server monitoring tools (e.g. Jenkins, Docker, Puppet, Nagios, Netcool, MS SCOM, HP Open View)


OS Linux: Ubuntu, Red Hat Enterprise Linux (RHEL) 5, Suse, Fedora, CentOS, Mint, Debian.

OS Windows: Windows NT, 2000, XP, 7, 2003, 2008, 2012, 2016.

OS building and deploying : Microsoft Deployment Toolkit (MDT), Windows Automated Installation Kit (WAIK), Operating System Deployment (OSD), Windows Deployment Services (WDS), PQPM, Norton Ghost, Acronis (true image, disk director)

Programming languages: Java, Shell, Power Shell, Perl, PHP, PL/SQL, Python, PL/SQL, HTML.

Free and commercial software: Samba, Perl, DHCP, BIND DNS, Sendmail, EXIM, debuggers and compilers, CVS, Subversion, Squid proxy, FTP servers, Puppet, Jenkins, AMANDA, PL/SQL Developer, SQL Plus, Aqua Data Studio, Eclipse, PyCharm.

Management software: HP OpenView, Nagios.Ansible.

Security skills: Checkpoint Firewall-1/VPN-1, securemote, SSH, SSL, PKI, PGP, Linux and FreeBSD firewalls, intrusion detection systems, Snort, Nessus, IPSec, RSA SecurID, antivirus, user based policies.

Windows integration: extensive knowledge of Samba, Cups – printserver, Active Directory, MS Cluster, MS Terminal Services.

Data Center: Blade Server System, rack and stack Data Center deployment from the ground up


Hardware: PBX (Avaya, Nortel, Panasonic), CISCO routers, Catalyst/Nexus switches, and firewalls, IBM blade center, Allied Telesis switches.

Databases: MySQL, Oracle, MS SQL, Sybase, databases installation, backup, replication and maintenance.

WEB technologies: Apache, Nginx, Tomcat, Jetty.

Virtualization technologies: VMWare ESX(i), VMWare Fusion, VirtualBox

Version Control System: SVN, GIT, Tortoise for SVN and for GIT, SourceTree.

QA technologies: Selenium WebDriver,Page Object, Robot, Cucumber(BDD, TDD), Appium, ADB, TestNG, Java, Gradle, Maven, Jenkins, JIRA, Ajile, Scrum,,

Another technologies: XPath, HTML, Internet Explorer, Google Chrome, Safari, Mozilla Firefox, SQL, Oracle, XML, VXML, IVR, Symposium, WFM Genesys 6.0, AWS (EC2,RDS), SCOM, Microsoft System Center Orchestrator, IIS, Active Directory, Citrix, MS Office(Word, Excel, Visio, Access, SharePoint LAMP, PHP My Admin.



QAUBER - Santa Clara, CA 1.2016 to 2.2018

Worked with engineering team on schema and query design to optimize performance.

Collaborated with development and architecture teams to influence the architecture and design of software and help to bring quality into the design of the product.

Responding to special requests via Ticketing system.

Troubleshooting tools related issues through Administration of servers.

General Linux, Windows, Mac OS X Administration.

Determine, gather, and analyze metrics around of systems and provide collecting data into Oracle DB.

Developed, improved and maintained scripts and tools.

Work closely with analysts to translate business requirements into technical solutions.

Maintained highest levels of development practices including: technical design, solution development, systems configuration, test documentation/execution, issue identification and resolution, writing clean, modular and self-sustaining code.

Architected innovative solutions to automate and scale business systems

Deployed and maintained automated build systems CI/CD Jenkins.

Set up VMWare Fusion, VMWare Workstation and AWS instance to test product in different environments(Linux, Windows, Mac OS X).

Windows infrastructure, including Active Directory, certificate services, DNS, and authentication protocols.

Filed critical errors in server logs.

Created and executed SQL Queries to perform backend database testing and to obtain test data using Oracle SQL developer.

Administrated Citrix Workspace and Atlassian applications: Jira, Confluence etc.


Miratech, Kyiv, Ukraine 5.2011 to 1.2016

Project - “Kyivstar”(telecommunication company),

Worked with different kinds of AWS instances. I was responsible for the installation, support and maintenance servers of CRM systems and create cable connections to other systems and set up their.

Dedicated systems engineer provided operations and consulting support of CRM systems and contact centers (СС) running on Windows, Linux, Mac OS X. Supported Windows, Mac OS X and Linux OS’s.

Developed specifications for new projects of CRM System IVR and support business as a dedicated engineer of the project life cycle to meet the needs of each business client.

Windows infrastructure, including Active Directory, certificate services, DNS, and authentication protocols.

Embedded and deployed different CRM Systems, according to business requirements.

Designing and implementing for fully automated server build management, monitoring and deployment by Puppet.

Automated processes for collecting historical data of calls to the call center, with subsequent analysis and sending of the report to stakeholders.

Provided Data-center support and administration. Streamline CRM systems server architecture and maximize usability for business clients of company. Control by investigating upgrades and new technology before implementation. Manage multiple simultaneous customer design and risk avoidance projects.

Communicated with other departments for joint implementation of business projects and to solve existing problems.

Worked out, tested and deployed IVR releases, according to business requirements.

Spearheaded Windows remote server automation effort by building script library by using the command line utilities to run complex scripts across dozens of servers with very low effort.

Played integral role in CRM systems(IVR, Symposium, WFM Genesys 6.0) architecture team and Client Operations group to provide SLA based services to existing clients, promoted team knowledge, wrote extensive system documentation and developed technologies to expand the company’s service offerings.

Carried out deployments, performed tuning, provide support and did migrations using Apache, Nginx.

Provided, administrated and configured by Java WEB application of incoming calls statistics using IVR running on Jetty WEB Server. Provided, administrated and configured by Java WEB application incoming calls statistics for Genesis WFM running on Apache Tomcat.

Created a procedure, that ensures full control of IVR information system with the possibility of report sending based on PL SQL.


“Kyivstar GSM” (telecommunication company), Kyiv Ukraine 10.2008 to 5.2011

Automated processes for collecting historical data of calls made to the call center, with subsequent analysis and sending of the reports to consumers.

Developed, tested and started IVR releases by production servers of CRM System IVR(environment of development included Python, VB, SQL, XML, PL/SQL ), according to business requirements.

A configured CRM information system IVR servers (dialing management in parametres in Call Centres ), a configuration of Intel Dialogic equipment according to the requirements of connected PRI E1(signalisation SS7 or ISDN).

Supported and administrated SVN based on “Visual SVN” server and client software “Tortois SVN”.

The constant analysed a work of CRM systems, implemented the new technologies.

Provided 24x7 hardware, systems monitoring and problem management via HP OpenView/SCOM and custom administration tools. Provided immediate solution to problems according to SLA.

Supported, administered and configured CRM information systems Nortel Symposium, WFM Genesys 6.0, IVR.

Supported, administered and configured WEB-App (Apache-Nginx, Perl, MySQL, SAMBA, DHCP, FTP, Cups, HylaFax) of real-time statistics incoming calls to IVR Running on Debian Linux.

I was responsible for installation, supporting the servers for CRM systems in Data-Center, running on Linux and Windous Server OS (1,2,5 units and BladeSystems). I have provided cabling connections with other systems and their subsequent tuning and start up.

Instrumental in launching nationwide network of self service (self service and electronic queue kiosks at customer service center of ‘Kyivstar’)

SYSTEM Administrator

Telenor Group(“Kyivstar GSM” ), Kyiv Ukraine 10.2006 to 10.2008

Supported, administrated, configured group-server running on Debian Linux.

Mounted, supported, connected, installed started IVR and MS SQL servers running on OS Windows Server .

Systems monitoring and problem management via HP OpenView, utilizing NetCool, Nagios

Maintained technical knowledge in networking area; operating system (Server and PC).

LAN Administration: added users; printers; removed users; controlling access right list.

Monitored server performance.

Responsible for creating, testing PC images using Image Centre and Ghost.

Supported more than 250 users at the Kyivstar Site in Kyiv and remote users in Western and South Ukraine.

Backup administration.

On-Call (24x7).


Master's in Electronics and Computer Science, Kyiv International University of Civil Aviation - Kyiv, Ukraine 1999

Unix Administrator - “SEMicom” training center, Kyiv, Ukraine 2006

Oracle Database 10g: SQL Fundamental part I,II 2009

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