PROFESSIONAL SUMMARY:

• 12+ years of professional work experience as a System/Application Administrator in multiple large infrastructure environments RHEL 5/6/7, WebLogic 10x/11x/12c, IBM AIX and Windows platforms (in Telecom, Retail and IT support services), cloud services like AWS and DevOps tools.
• Experience in creation & maintenance of User/Group administration, SUDO, file system management, configuration of clients/servers & troubleshooting in Linux & Unix Servers.
• Experienced in deploying RHEL 5.x, 6.x, 7.x in a Physical and virtual environment.
• Automation of daily jobs, backups, maintenance and health check monitoring activities.
• Experience in setting up the servers monitoring system with Nagios.
• Scheduling cron jobs for space cleanups, Powerbroker cache cleanup and daily backups.
• Experience in RPM Package Administration for installing, upgrading, and checking dependencies, reconfiguring RPM databases using RPM Build and creating YUM repositories in RHEL.
• Deployed Puppet, Puppet Dashboard, and PuppetDB for configuration management to existing infrastructure and assisted in building automation policies.
• Used Puppet to assist in building automation policies and have knowledge on Ansible.
• Used Puppet to manage Web Applications, Config Files, Data Base, Commands, Users Mount Points, Packages.
• Expanding our AWS infrastructure, and providing mentorship to others in my team.
• Experience in AWS cloud environments and familiar with EC2, CloudWatch and Elastic IP’s and managing security groups in AWS.
• Experience in running applications in Oracle web logic and Apache Tomcat.
• Involved in analyzing WebLogic Thread Dump and Heap Dump analysis for Server hang, High CPU and server crash patterns.
• Having good understanding on Garbage collection and Performance Tuning of Garbage collection.
• Set up Bench - marking to closely monitor server resource utilization and provided direction to team members to add resources as needed to ensure organizational uptime standards.
• Ability to handle multiple tasks, have good time management skills, and can handle work under pressure.
• Troubleshooting skills on the production side and managing the outages.
• Ability to work closely with teams, to ensure high quality and timely delivery of builds and releases.
• Excellent team player with good communication and leadership skills.

TECHNICAL SKILLS:

Operating Systems:: RHEL 5.0/6.0/7.0, Unix, AIX, CentOS, Windows, HP-UX.

Programming Languages:: Shell Scripting, PowerShell.

Monitoring Tools: Nagios, VMWare vSphere Client, ILO, Splunk, Zenoss.

Configuration Management Tool: Puppet, Ansible.

Ticketing Tools: ServiceNow, Numara Footprints, Remedy 7.0.

AWS Cloud Tools: EC2, Elastic Beanstalk, VPC, Route 53, EBS, S3, Glacier, AMI, RDS, Dynamo DB, IAM, Cloud Watch, Cloud Trail.

Email Servers: Sendmail, Postfix

Others: MS-Office

Application/Web servers: WebLogic, Apache Tomcat, JBoss.

Database Technologies: Oracle, SQL

Other Tools: Foreman, WinSCP, Putty, Cyberark Tool, Storix, OEM, HP Diagnostic Tool 9.2, Software AG, Remote Desktop Manger.

WORK EXPERIENCE:

Confidential, Goodlettsville, TN

Lead System Administrator

Environment: Red Hat Enterprise Linux 5/6/7, Puppet, VMware ESX/ESXi 4/5, Windows Enterprise Edition, EMC, EC2, SAN.

Responsibilities: ­­

• Provide support to Application Team as per application requirements. Handle calls for Server with application support teams and provide accurate information for quick restoration of service
• Responsibility includes day-to-day problem solving and user assistance activities such as maintenance of the system by installing, upgrading the application packages, monitoring & troubleshooting the issues.
• Provided 24X7 and rotational shifts to support Server Infrastructure.
• Involved in applying new patches and packages for Linux Servers and handled issues arising out of them.
• Configured Kernel Parameters for application/databases to meet organizational needs.
• Provide remote support for Linux servers and maintaining SLAs, Performance tuning and enhancing.
• Installing and configuring EMC PowerPaths on Linux servers as per the request and troubleshooting email alerts with support of storage team.
• Respond to emergency calls relating to server performance, diagnosis of problems, repairing problems or calling upon appropriate vendors to resolve the issue.
• Managed change requests on Dev / Production environment and familiar with Change management.
• Preparing monthly work status report & updating technology specific documents.
• Conduct detailed & comprehensive investigation of various builds and decommissions.
• Performing upgrades for Dell/HP server Bios/Firmware.
• Implement changes, perform security related tasks to identify and recommend improvements to existing processes and procedures.
• Image and deploy new Linux servers as per client requests and performed QA/Tests of new server builds & new VMs.
• Managing VMware for Linux VM’s as requested by owners.
• User & Group Management and SUDO Access to Users.
• Install and update software packages using rpm and yum.
• Create or extend LVM file systems for new storage requests. Collaborated with Storage team & manage SAN storage presented to Linux servers (LVM, multipath).
• Manage Server Hardware Issues by co-coordinating with Hardware Vendors like HP, SMS etc.
• Co-ordinate with the Decommission of servers and removing storage with help of Storage team.
• Monitor & Troubleshoot OS performance, hardware, software and network related issues
• Ensure timely creation of necessary reports or documentation related to the job or update the knowledge base
• Resolving all level tickets through Service Now.
• Monitoring and maintaining servers using Nagios monitoring tool.

Confidential, Atlanta, GA

Sr. System Administrator

Environment: Red Hat Enterprise Linux 5/6, VMware ESX/ESXi 4/5, Windows Enterprise Edition, EMC, WebLogic 10/11/12c.

Responsibilities: ­­

• Provided both server and application support to client’s enterprise setup and manage & resolve problems.
• User assistance activities such as maintenance of the system by installing, upgrading the application packages.
• Provide support to Application & DBA Teams as per requirements or to resolve issue related to application from OS level.
• Implement changes and troubleshoot issue related to Backup as requested by backup team.
• Create new file system or extend file system as request by storage/DBA teams and clients.
• Co-coordinating with hardware vendors like Dell, HP and clients for the server downtime to replacement hardware or troubleshoot hardware issues.
• Schedule task automation jobs using cron for frequent server clean up and maintenance tasks.
• Monitor & Troubleshoot OS performance, hardware, software and network related issues using Zenoss.
• Resolving Remedy ITSM Incident Management tickets on time.
• Primary Support leading various applications and sub-systems.
• Coordinating the development/UNIX/middleware teams in problem resolution.
• Writing scripts to automate the routine maintenance activities.
• Managing and maintaining of System maintenance windows.
• Troubleshooting the issues related to disk space, outages and memory leaks.
• Creating and running cron jobs to synchronize the automated activities.
• Assist team in troubleshooting & resolution of server performance issues, software and network related issues.

Confidential

Linux System Administrator

Environment: Red Hat Enterprise Linux 5/6, WebLogic 10/11g/12c, Windows 2000/2003, VMWare vSphere Client

Responsibilities :

• Troubleshooting the issues related to disk space, outages and memory leaks.
• Creating and running cron jobs to synchronize the automated activities.
• Attaching devices to volumes and resizing file systems.
• Scheduling cron jobs for daily backups and application data pulls.
• Developed startup and shutdown scripts for the servers.
• Install, configure and administer WebLogic Server 10.3 in various environments.
• Performance tuning, application deployment and testing WebLogic Tools and Console.
• Implementing Deployments and handling scripts using Unix Shell Scripting.
• Configured Node manager to administer the managed servers.
• Troubleshooting L2/L3 tickets related to all servers.
• Supporting multiple clients on both Linux and WebLogic fronts.
• Primary Support leading various applications and sub-systems.
• Analyze the issue after detailed troubleshooting of the alert and make sure that the issues are fixed & the alerts are cleared as per SLA.
• Attending crisis management calls whenever required on support the applications on a 24*7 basis.
• Documenting the process as per ITIL standards.
• Handling P1, P2 calls and providing RCA on various applications.
• Conducted brown-bag sessions on product and application related problems.
• Shell scripting and automation of manual jobs in production support.

Confidential

System Administrator

Environment: Red Hat Enterprise Linux 4/5, VMware vSphere4.0, ESXi server, VMware vCenter, VMware Update manager, Dell hardware.

Responsibilities:

• Taking initiative in configuring the SNMP in the ESXi Hosts and adding them to monitoring.
• Configuring the Backup pre - requirements and working with the backup team to add the servers to the backups.
• Documenting all the important documents during the deployment phase, also updating the password database and transferring the knowledge to the teammates for better support to the customer.
• Taking the inputs from the Network team, assigning the server names and IP Addresses during the planning phase of the project.
• Creating the Local Admin groups and cleaning up of Active Directory accounts as per the customer requirements.
• Placing the physical servers in the rack, later running and labeling the network cables in the data center.
• Performing Quarterly checks covering the areas like Firmware in the DRAC card, Warranty checks, Storage Alerts, VMware Hosts performance covering the complete Environment.
• Configuring Alerts in the VMware Infrastructure.
• Configuring Virtual networking on ESX servers.