Gregory Rozhkov Email & Phone Number

United States

United States

Kiev Region, Ukraine

Kiev, Ukraine

• Involvement in technical infrastructure projects
• Complete Migration Plan with on-site implementation, performance analysis and support of business continuity process during data migration off legacy storage systems USP/USP-V/VM onto new VSP using Tiered Storage.
• Business backup software solution deployment regarding company policies
• Maximizing scalability and improve performance of Billing Applications on Windows Server 2008R2 with VMware vSphere 5 and IBM Blade Centers H
• Storage systems expansion in adoption of business growth
• Migration off existing Prepaid billing system onto the Convergent billing system. Main role was to maintain process of change legacy equipment and creating a custom deployment plan

Kiev, Ukraine

• Major Responsibilities
• Storage System Administration of Hitachi (HDS) Enterprise VSP and Modular AMS 2500, also legacy products such as USP/USP-V/VM and the Lightning Series
• Implementing data storage solutions for Billing Department used with HDS/HP disk arrays to maintain wide variety of workloads
• Two Data Center (2DC) local and remote replication architecture deployment
• Completing a whole problem-solving sequences and tuning solutions to achieve appropriate performance combining Hitachi storage and Oracle Database 11i using customized reports and alerts from HCS 7.2 Tuning Manager.
• Implementing of best practices for configuring storage virtualization to reduce data center cost of ownership

Kiev, Ukraine

• Major Responsibilities
• Storage Administration of Sun SE9990/SE9970V, formerly Hitachi USP/Lightning Series disk arrays
• Solaris 9 OE System Administration with VERITAS Volume manager 4.x on SPARC E25K high-end and E6900/E6800/V890/V490 mid-range servers
• Product support and troubleshooting of PUMA custom designed Prepaid Billing system and front-end applications in Tomcat/Resin Java Containers
• Providing continuity of BSCS V6 Rating and Billing processes in HP-UX and Oracle 9i Database environments
• New services and tariffs deployment, using BSCS V6 Message Processing module and Oracle PL/SQL scriptsInvolvement in projects

Kiev, Ukraine

• Major Responsibilities
• Provisioning interfaces support for different Network Elements and OSS/BSS system
• Advanced support of custom designed the Call Data Records (CDR) pre-processing system
• Monitoring of BSCS V6 Rating and Billing batch modules workflow
• Performance improvements by increasing application efficiency and eliminating resource shortages and bottlenecks in Oracle 9i/8i and HP-UX operating environments
• Development of a variety SQL/PLSQL and Posix shell scripts, programming on C/C++ under UNIX Systems

Kiev, Ukraine

• Major Responsibilities
• Management of Novell Netware services for corporate network
• Deployment of PARUS system for the Department of Finance
• Advanced End User Support
• Planning, implementing, and maintaining a Network Infrastructure

Kiev, Ukraine

Responsible for End User Support, x86 microcomputers technical maintenance, System Administration of corporate Novell Netware servers and workstations