· Managed 100+ physical and virtual hosts with RedHat Linux OS. · Worked with VMware and AWS products in the Dev, UAT, PROD, and COOP (DR) environments. · Built, configured, and managed new Linux instances in VMware as well as EC2 instances in AWS with S3, Security Groups, EFS, and other related resources. · Was responsible for systems performance monitoring using Zabbix and other tools. · Used Red Hat Satellite server for subscriptions and packages management. · Assisted development teams in researching and troubleshooting emerging application issues. · Was responsible for composing and writing related technical documentation and instructions for the client and the company use. · Contacted customer support personnel of hardware and software vendors for various issues resolution. · Monthly applied security and performance patches to the environment servers. · Was responsible for configuring Single Sign On / Active Directory Integration on Linux servers. · Troubleshot Oracle Weblogic, IBM Websphere, and other middleware issues. · Extensively used Ansible automation tools for various tasks in the environment. · Performed cyber-security duties related to the environment management (scans, vulnerabilities management, Risk Acceptance Memos writing, etc.) Environment: Red Hat Linux 6/7/8x OS, Weblogic 12c, IBM WebSphere 8/9, Tomcat 9, Apache Web Servers, VMWare, Failover Cluster Manger, Zabbix Monitor, Red Hat Satellite 6, AWS, Zabbix.

· Provided support to developers in remediating web applications due to upgrade of middleware components such as: Apache, Tomcat, WebLogic on Linux and Solaris platform; · Worked with Engineering and Infrastructure build teams to provision middleware instances at various stages (DEV, SIT, UAT and PROD); · Configured the middleware instances; · Troubleshot and performance problem analysis during development, testing phases and production deployment; · Identified break points and provided solutions during upgrade; · Provided documentation on solutions and operational steps; · Developed implementation plans for UAT and PRODUCTION deployments; · Participated in PROD deployment activities; · Created bash and WLST scripts for various tasks; · Conducted training for junior team members. Environment: Weblogic 11g/12c; Tomcat 8; Apache Web Servers; Oracle, Sybase, and DB2 Databases; Solaris 10 and Linux 5/6/7x OS, WebMethods.

Responsibilities: · Managed over 70 java applications running on Tomcat application servers in a high availability environment. · Quarterly applied patches and upgraded Tomcat containers, JDKs and Apache web servers. · Closely worked with development and business teams to resolve issues and plan new releases. · Was responsible for weekly deployments and releases of the new and existing applications. · Composed shell scripts for cron jobs and other needs. · Configured new SiteScope monitors for servers and applications. · Managed over 20 servers with over 400 Tomcat containers on Linux and Solaris OS in production and test environments. · Migrated IT systems to a new more reliable architecture. · Was responsible for writing technical documentation and instructions. · Weekly composed Capacity Planning reports and presented them to higher management. · Was an active member of the DevOps and Agile teams. Environment: Tomcat 7/8, Apache Web Servers, Oracle Database 12c, Solaris 10 and Linux 7.3 OS, HP SiteScope, Clear Case, Clear Quest, Jira, F5 load balancer, VMWare.

Responsibilities: · Installed, configured and administered WebLogic Server, Oracle Service Bus, Jboss, Tomcat, Apache, Nginx servers in production, staging, load-testing and data recovery high-load environments (over 800 requests per second). · Upgraded Weblogic domains from 9.2 to 11g to 12c. · Configured and administered various WL services JDBC, JMS, etc. · Researched and troubleshot emerging application issues. · Installed and configured Wily Introscope to monitor servers. · Managed over 120 servers with Linux and Windows OS in production and test environments. · Composed shell scripts for OS and WL services. · Managed software licenses and support contracts. · Annually renewed SSL certificates on 6 web and 8 application servers. · Migrated IT systems to a new more reliable architecture. · Was responsible for writing technical documentation and instructions. · Daily supported development and QA teams. · Participated in various cross-countries work projects of Home Credit International. · Performed administrative duties of the Head of the Department. · Was in charge of the team of 8 subordinates. · On a regular basis reported to the head of the Division. · Weekly composed status reports. · Constantly coordinated 3-5 simultaneous IT projects. · Was an active member of the DevOps teams, working with such tools and software as Ansible, Kibana, PostgreSQL, Nginx. Environment: Apache and NGinx Web Servers, WebLogic server 9/11g/12c, Oracle Database 11i, Linux, Windows Server 2003/2008, CA Wily monitoring system, RedHat Cluster, JRockit Mission Control, Memory Analyzing Tool, Ansible, Kibana, PostgreSQL, MS Project, MS Visio.

Responsibilities: Managed an environment of 15 servers with Solaris, Linux, and Windows 2003 OS. Administered network infrastructure of the environment consisting of Firewall, VPN Concentrator, Switches, and Load Balancers. Configured new database servers with the implementation of SUN zones/containers. Installed, configured and administered instances of Oracle/BEA WebLogic Server and Sun Web Servers in production, test and development environments. Created and configured clustered web, application and database environments. Daily administered various WebLogic services JDBC, JMS, SNMP in Weblogic Server. On a monthly basis deployed WAR, JAR, and EAR applications. Extensively used customized WebLogic scripts to create and manage WebLogic domains. Upgraded WebLogic servers from version 8.1 to 9.2 and transferred the services to the new version. Provided a detailed analysis and a plan of the servers upgrade to the Project Manager. Worked with VMware products in the development environment and configured autonomous instances on the development servers. Researched and troubleshot emerging application issues, from WebLogic configuration to Web Servers configuration and code issues. On the as-needed basis modified rules and redirects for the customer specified requests on Web servers. Renewed web servers’ SSL certificates. Installed and configured Symantec Veritas Cluster Management software on the database servers in the production environment. Managed hardware and software licenses and support contracts and was in charge of the renewal process. · Was responsible for composing and writing technical documentation and instructions for the client and the company use. · Quarterly applied security and performance patches to the environment servers. · Actively supported development engineers and QA team. · Weekly visited data center facility to manage servers backups and to visually inspect the equipment. · Worked with hardware resellers and was actively engaged in th

Responsibilities: Installed, configured and administered 9 instances of WebLogic Server 8.1/9.2 in production, staging and data recovery environments. Daily configured and administered various WebLogic services JDBC, JMS, SNMP in Weblogic Server 8.1 and 9.2. Created and configured clustered WebLogic environments. Routinely deployed WAR, JAR, and EAR applications. Extensively used customized WebLogic scripts to create and manage WebLogic domains. Upgraded 48 WebLogic instances from version 8.1 to 9.2. Researched and troubleshot emerging application issues, from WebLogic configuration to Apache configuration and code issues. Configured Apache to act as proxy server for back end WebLogic application servers. Installed and configured Wily Introscope and WebLogic Diagnostic Framework to monitor WebLogic servers. · Configured LDAP for user authentication. · Added log-rotation scripts for various services on over 30 servers; created auto start-up scripts for WebLogic servers. · Was responsible for composing and writing technical documentation and instructions for the client and the company use. · Quarterly applied security and performance patches to the 12 WebLogic instances. Supported on call schedule for Production support. Environment: Apache, BIG-IP, WebLogic Server 8.1 SP2 & SP5/ WebLogic Server 9.2 MP2 & MP3, Wily Introscope, Solaris, Linux, Windows 2000, Oracle 9i, Vignette