TECHNICAL SKILLS:

Linux/Unix, RedHat, CentOS, Apache, Tomcat, Weblogic, Drupal, Cloud system, Virtual Servers, Network, Java, Chef & Puppet, SQL, Shell, Nagios, ITIL/ITSM, J2EE, XML, HTTP, HTTPS, SSL, Big Data/Hadoop, TCP/IP, DNS, ORACLE/Sybase/MySQL, Database Analysis/Design, Modeling, Data Integration, Data ETL, ER/Studio, ERWIN

PROFESSIONAL EXPERIENCE:

Confidential, Herndon, VA

Sr. Linux System Engineer

Responsibilities:

• Setting up, configuration, integration, deploying, troubleshooting and customer service with Confidential (Meteorological Assimilation Data Ingest System, large data exchange Cloud systems) including supported and monitored Java applications, Web application, Apache and Tomcat in RedHat. (RedHat Enterprise 6.6)
• Supported customers through phone and email to troubleshooting any servers, networking and applications issues from the production.
• Environment controlled through DEV, QA and Ops with Subversion, checked out and compiled the code and tested the final version (unit testing, Integrated testing, end to end testing, load testing and data verification) in the staging before building up release version
• Monitored servers, network, processes and applications with Big Brother
• System automation with the scripts or SQL programming based on system/users requested

Confidential, San Mateo, CA

Sr. System Engineer

Responsibilities:

• Setting up, configuration, integration, deploying, troubleshooting and customer service with Big Data system (CareReflex and BizReflex) including supported and monitored Java applications, Web applications, Hadoop (Cloud System) applications and IBM Nettzza database in CentOS(SaaS).
• Provide Onsite service in the Data Center (Sprint and Verizon) to troubleshoot the hardware ( Confidential and Confidential Servers), issues, fixed and replaced them. (rebuild servers from scratch, Raid 5 with CentOS 6.5 and installed Hadoop )
• Worked with customers to troubleshooting any hardware, kernel, networking and applications issues from the production (worked with Salesforce and Jira ticket system)
• Install, configure and administer VMware virtualization environment
• Provide detail steps to get approved from clients before deploying any new release or fixing any issues from the production

Confidential, Rockville, MD

Sr. System Engineer

Responsibilities:

• Setting up, configuration, integration, deploying, troubleshooting and customer service with Confidential Electronic Submission Gateway) Data exchange system including supported Java application, Web server security, Data security (AS2, SFTP,SSL, PKI) and Oracle database with RAC in Unix (SUN Solaris).
• Provide guidance to developers on their development environments
• DevOps: the environment controlled through DEV, QA and Ops with Subversion. Coordinated the deployment of codes, data models and implementation documents for the various testing application servers
• Develop And Maintain O&S Standard Operating Procedures For VMware Virtualization Environment.
• Developed application component deploy and build scripts

Confidential, Dulles, VA

Sr. Linux/Unix System Administrator/System Analyst

Responsibilities:

• Business + applications requirements design system architecture diagram including hosts, network, VIP (Virtual IP Address), GSLB (Global Server Load Balancing), Database, Interface and Clients Info Order and purchase Hardware (Hosts) set up system configurations, network and hosts firewall and install the packages, software and applications setup monitor system like Argus, Scout and Nagios to monitor the hardware and applications (can send out a email to team or pager on - call for any issues based on the requirements)
• SMI migration project from weblogic to Tomcat: New system architecture, Tomcat applications in new hosts, open network firewall holes, configure SMI proxy apache to move prod traffic to tomcat hosts and end to end testing with our business partners like Verizon.
• PCI Black Network Project: Moved all PCI related applications to black network. New Hosts, new network architecture, firewall and rebuild new applications environment
• CBI/REE migration project: New system architecture, Tomcat applications with ActiveMQ to support our US and Europe clients
• CTC migration project: Move all hosts from Columbus data center to Dulles data center. New system architecture, migrated all applications from the old hosts to new hosts and decommission all old hosts in CTC
• Web administrator for Apache and Tomcat. Setting up, configuration, troubleshooting, analyzing any bugs or performance issues and also deploying jar or war files for Tomcat applications
• To provide automation, used Configuration Management Tool Chef & Puppet.
• Linux/Unix System administration, installing, configuration, upgrading and supporting (setup network, DNS, IP address /Gateway for new server/VM). Troubleshooting any kernel and package issues.
• Install, Configure, And Troubleshot VMware Infrastructure.
• As a SA, used host level firewall, network firewall to improve the network/hosts security and SSL, SFTP, HTTPS and Thrasher to protect our websites from hacking.
• Worked as SA of the Nagios production system, done with the system migration to Nagios 3.4.1 and monitored all critical systems/applications which are supported by our team
• Set up and administered a Drupal server
• On-call support more than one hundred hosts and ten business systems in UNIX/LINUX and Windows NT environments and administrator of the web servers like Apache, Weblogic and Tomcat (J2EE applications). Worked with Remedy system to fix the production issues day by day
• Wrote automation scripts in Shell, MySQL support
• Reduced the operation time and increased the efficiency by setting up the Shell scripts, cron and Autosys jobs to manage file systems, files transfer automatically and production reports
• DevOps: Environments version controlled through DEV, QA and Ops with CVS and worked with DEV and QA rapidly and frequently on final release software.
• JAVA/J2EE Systems performance turning (OS, JVM, Network and Database).

Confidential, Ashburn, VA

Senior System Analyst

Responsibilities:

• Designed a data model based on the business requirements and the system architecture
• Built the logic and physical object oriented ER modeling with ERWIN
• Based on the system design and the database modeling, doing the system detail design (Design the interface between the messages GUI and the database using TIBCO IM/RV/MB/JDBC tools on the Client/Server Architecture
• Produced the system test plan/procedures/test cases
• Coding and unit testing with Unix and Oracle (Java, Java scripts and PL-SQL)
• Leaded the volume testing in the Unix environment to ensure the applications and system performance in the production
• Supported string and QA testing and production implementation
• Monitored the system performance in the production
• Analysis the system performance and generate the reports of the capacity planning analysis by the system.
• Designed the Polaris system data modeling based on the business architecture and built the logic and physical ER model with ERWIN
• Project leader of the data and database Archive project
• Data analysis based on the user requests
• Project leader of the database synchronization (Synchronized the data between the databases)
• Transactions analysis and monitored the applications to ensure the system performance
• Analysis and test scripts and queried before they are running on production
• Designed reports and auto-jobs using Shell script and set up the cron jobs

Confidential, Richmond, VA

Senior Programmer/Analyst

Responsibilities:

• Re-designed the system ( Confidential /UX/C), so it can handle millions records/ per day through the satellite system
• Queried analysis based on the user requests
• Designed the queries running on a large real time database with SQL, Embedded SQL and C in Confidential -9000 UNIX
• Transactions analysis to ensure the integrity of the data and systems performance
• Designed an auto-paging system for applications with Tivoli in Confidential -UNIX
• On-Call Supported twenty-four applications in Confidential -9000 UNIX and Confidential -3000 MPE
• High level On-line supported with Expert Advisor Software through the LAN
• Knowledge of Reflection, Opt-Tect Sort and Postware Software

Confidential

Network Administrator / Sr. Programmer Analyst

Responsibilities:

• Developed and implemented an Confidential (Electroencephalography) Database system with Paradox in Windows 3.1
• Designed an Confidential Database with MS Access in Windows NT Environment
• Developed and implemented database applications with Visual BASIC (5.0) in Windows NT
• Designed a Image Graphics system with Visual C++ (Version 4.2) in Windows 95
• Windows NT Network Administrator, Install, configure server and workstations
• Maintained and supported PC hardware/software and Laser printer
• Knowledge of TCP/IP, Client/Server and ODBC