SUMMARY

• Over 7+ years of specialized experience in Linux and UNIX Administration.
• Installing, configuring, administrating, troubleshooting, tuning, security, backup, recovery and upgrades of IBM AIX and Linux (Red Hat & SuSE) in a very large environment.
• UNIX and Linux systems and networking technologies including VPN, IPsec, DNS, TCP/IP, SSL, DHCP and Load Balancing.
• Partitioning and configuring with HMC.
• Experienced in all aspects of AIX System Administration and support for all server’s OS installation and upgrade, OS problem resolution, application of OS fixes, installation of application software, administration of user accounts, system configuration, troubleshooting, system monitoring, system tuning, security updates, hardware maintenance, disk usage maintenance, etc.
• In depth knowledge in server buildouts and cloning.
• Experience working with free BSD and Illumos (Solaris).
• Maintained and supported FreeBSD servers.
• Configured and migrated virtual machines on VMware and PowerVM from one host to other.
• Worked on VMware virtualization platform.
• Proficiency with configuration and maintenance of NFS, DNS, NIS/NIS+, DHCP, SMTP
• Good knowledge in IBM AIX hardware components (RS/6000, pSeries), trouble - shooting and maintenance of PC's
• Deployment, Scripting and Automation: Shell scripting, Python, Ruby, PHP PERL.
• Installation and configuration of VIO Server and clients with AIX 5.3-7.1 on client PSeries hardware.
• Installation of WebSphere on AIX server.
• Managed and configured PowerHA/HACMP and High Availability clusters on AIX and Linux.
• Experience in monitoring the availability & performance of AIX Servers through tools like vmstat, netstat, and iostat.
• Experienced in installation, support, configuration, performance tuning, troubleshooting, maintenance of Red hat Linux and Solaris using Kick start, Custom Jumpstart Server and Interactive installation.
• Involved in installation, configuration, and administration of RHEL 5x/6.x/7.x servers and Migrating AIX OS from 5.1 to 5.2, 5.3, 6.1 and 7.1.
• Expertise in migration from HACMP V4.4 to HACMP V4.5 and migrations of data center and experienced in Installation, configuration, maintenance and troubleshooting of HACMP 4.5 on AIX 5. Skilled at IBM-AIX kernel Tuning, Performance Analysis and Load Balancing.
• Configuration management including the building of LPARs and configuring the client hardware devices.
• Everyday Network administration tasks - adding and removing users file and share permissions, trust management, replication management, server backups, and server setups.
• Proven ability to define System requirements, recommended solutions, analyze capacity and make appropriate modifications.
• Providing onsite and remote support for Linux and AIX Server's.
• Excellent team worker and ability to quickly adopt and work under minimal supervision, providing 24x7 on call server support.

PROFESSIONAL EXPERIENCE

Linux/Unix Systems Engineer

Confidential - Chicago, IL

Responsibilities:

• Installing Red HatLinux using Kickstart and applying security polices for hardening the server based on the company policies.
• Creating, cloning Linux Virtual Machines, templates using VMware ESX 4.x, 5.x.
• Performing capacity analysis, monitoring and controlling disk space usage on systems.
• Monitoring system activities and fine tuning system parameters and configurations to optimize performance and ensuring security of systems.
• Install, configure, and troubleshoot enterprise-wide Apache web servers and Tomcat application containers in a large Red Hat Linux/CentOS environment
• Advanced FreeBSD systems administration experience, including ability to analyze, monitor and tune system performance.
• Built and maintained FreeBSD servers for many application and database servers like WWW, MySQL and LDAP.
• FreeBSD Advanced Knowledge - with ability to install software via ports, CVSup.
• Develop FreeBSD-based web applications by designing, developing and improving core functionality in products such as: FreeNAS, TrueNAS, PC-BSD, iocage, and bhyve.
• Strong grasp of security principles and how they applied to FreeBSD-based applications.
• Develop and maintain FreeBSD-based front-end and back-end web applications for the development of client and server-side technologies, integrating data from various back-end services and databases.
• Implemented Cassandra data replication
• Managed Cassandra cluster using nodetool utility and also used sstableloader to load external data in to another cluster with a different number nodes or replication strategy.
• Configured authorization to Cassandra cluster using Password Authenticator and Kerberos.
• Implemented a Backup/restore Model for Cassandra.
• Develop, code, install, test, debug and document FreeBSD-based web software applications using an open source editor/IDE.
• Nagios monitoring configuration and deployment and Managed client cloud application servers and respond to Nagios alerts.
• Nagios log Server configuration and deployment and Nagios script and check development, testing, and deployment.
• Used Pandora-FMS to monitor server infrastructure for performance and application monitoring (APM).
• Understanding about Pandora-FMS's Functionality, Fault Management Features, Configuration Management.
• Configured Pandora-FMS for active fault detection and alarm filtering for present servers.
• Configured Pandora-FMS to receive Email alerts, Error logging, and Fault detection.
• Installed, configured, administered and supported WebSphere Application Servers 7.0 and 8.0. 8.5.
• Implemented Clustering, Performance tuning and troubleshooting of IBM WebSphere Application Server.
• Configured the Web Server interfaces, session management, virtual hosts and transports for WebSphere Application servers.
• Implemented standard backup procedures for WebSphere and applications.
• Migrated existing applications from WebSphere V7. x. to 8.5
• Installing and configuring VIO Servers, building LPAR clients and sharing I/O devices to LPAR's.
• Provided extensive Production Support (24x7) of VIO Servers and Client LPAR's on IBM P- Series p750 and p780 Frames in a fast paced complex environment.
• Extensively involved in production support and maintenance of VIO servers (vio 2.0.1, 2.1.3.3 and 2.2.3.3).
• Production support of and maintenance activities of client LPAR's in various AIX versions AIX 6.1/ 7.1.
• Strong working knowledge with VSCSI and NPIV technologies and involved in troubleshooting and fixing the issues related to various disk mappings on VIO clients.
• Experienced with Shared Ethernet adapter (SEA) technologies and break fix of issues related to SEA's.
• Experience with Cluster technologies HACMP and GPFS.
• Good working experience in HACMP (IBM PowerHA (6.1/7.1) Cluster Configuration, Configuring HACMP networks, Failover testing and verification, performing HACMP health checks, checking cluster statistics and observing resource group status.
• Administered Failover process in PowerHA cluster environment by monitoring the servers.
• Good working knowledge in GPFS Cluster (3.5V) administration and maintenance.
• Migrated Power HA from 5.x to 6.1 using different methods to reduce the downtime to the application.
• Troubleshooting the POWER HA and increasing the filesystem in HACMP/POWER HA cluster.
• Configured IBM P-series 770, 750, 595, 570,550 and RS/6000 machines for production and test environments.
• Planning the major patch releases by coordinating with the application team for the proper implementation of security patches within the environments.
• Involved in hardware migration of servers from p5 to p6 to p7 and finally to Power 8.
• Developed and implemented the shell scripting for taking Mksysb and push to the centralized NIM server.
• Doing designing, Implementing and configuration of two nodes Active-Active using PowerHA and GPFS.
• Involved in migration of Physical to virtual servers (P2V) and virtual to virtual servers (V2V).
• VIO Server operations, creating virtual adapters and configuring Ethernet or LUNs to LPAR's and performing other troubleshooting techniques. Creating ether channel with link aggregation etc.

DevOps/Linux Engineer

Confidential, Austin, TX

Responsibilities:

• Served as a Level 3 resource for the building, deployment, break/fix, and upgrades of customer Red hat Linux Versions 4-7, Windows Servers R2-2012, Oracle Linux, and AIX Versions 5-7 clients, including both physical and virtual servers (VMWare ESX/ESXi and PowerVM)
• AIX and Linux OS installation and upgrade, OS problem resolution, application of OS fixes, installation of application software, administration of user accounts, system configuration, troubleshooting, system monitoring, system tuning, security updates, hardware maintenance, disk usage maintenance, etc.
• Deployed more than 300 virtual servers on PowerVM (VIO server and client) and VMWare ESX/ESXi.
• Experience in installation, configuration, deployment and management, setting up the Development, Testing, Staging and Production environments of Oracle Weblogic 10/11g Server, SOA 11g and WebSphere Application Server on AIX, Unix, Sun Solaris, Windows servers.
• Experienced in SOA Suite, WebCenter and Oracle Application Server administration and deployments.
• Involved in capacity planning and requirements gathering for multi datacenter Cassandra cluster.
• Implemented backing map to evict data from coherence solutions to Cassandra layer.
• Implemented spark solution to enable real time reports from Cassandra data.
• Designed and implemented dual datacenter setup for all Cassandra clusters.
• Experience in Administration of WebLogic Server on Unix/Linux OS.
• Performed WebLogic Server administration tasks such as installations (12c), upgrading, patching, deployments, configuration, monitoring, and performance tuning of WebLogic application server in multi cluster/server environment.
• Expertise in various methods of AIX/Linux/Solaris OS installation/ Migration using Network Installation Manager (NIM), Jumpstart and Kick start.
• Daily level 3 problem solving and tasks such as Oracle ASM disks, LVM and CIFS file system management, break/fix issues, user administration, etc.
• Worked in a team for installing and configuring Zabbix monitoring system for monitoring Service Availability, Disk Space Usage & availability and Host Availability.
• Adhered to change management and audit guidelines as well as security requirements for each customer’s servers.
• Completed documentation and preparing procedures for various UNIX tasks.
• Assisted with Unix Server maintenance activities such as patching, disaster recovery practice, etc.
• Setup and maintained PowerHA/HAMCP clusters and Oracle ASM clusters on a server level.
• Setup Webmin server and client.
• Served on multiple on-call schedules, including 24x7 on-call rotation.

AIX/Linux Administrator:

Confidential, Henderson NV

Responsibilities:

• Installing, upgrading and configuring Linux Servers using Kickstart as well as manual installations and the recovery of root password.
• Experienced in Troubleshooting Linux Systems identifying Hardware, software (both OS and Application level), and networking Issues
• Engineered, provisioned and provided Level III support for AIX, Windows, Linux and Solaris Servers, and provided 24x7 on call server support for Production and Development environments.
• Installation, setup and configuration of RHEL and VMware ESX on HP, Dell and IBM hardware
• Installed and configured Red Hat Linux 5x, 6x, Linux Desktop, SUSE Linux Enterprise Server 9.x, 10.x, 11.x & AIX 5.2/5.1/4.3
• Added applications to Configuration Manager 2012 Application Catalog.
• Debugged application installs for standard users in Windows 7.
• Debugged application deployment through Configuration Manager 2012
• Setup, Implementation, Configuration, documentation of Backup/Restore solutions for Disaster/Business Recovery of clients using TSM backup on UNIX, SUSE &Red hat Linux platforms.
• Experience in Creation and managing user accounts, security, rights. Disk space and process monitoring in Red Hat Linux.
• AIX, Windows, and Linux OS installation and upgrade, OS problem resolution, application of OS fixes, installation of application software, administration of user accounts, system configuration, troubleshooting, system monitoring, system tuning, security updates, hardware maintenance, disk usage maintenance, etc.
• VIO/Power VM server and client setup, troubleshooting, and maintenance
• Implementing server monitoring and security using Nagios and BMC
• Virtualization using PowerVM/VIOS and VMWare ESX
• Advanced administration of LAMP solutions (Linux, Apache, MySQL, PHP)
• Writing and editing scripts using an administrative language (Bash, Perl, Python)
• Identifying, troubleshooting, and resolving technical problems relating to systems and applications.

Unix Systems Admin

Confidential

Responsibilities:

• Assisted senior-level administrators in various aspects of Linux(Red Hat) server administration including installing and maintaining the operating system software, performance monitoring, problem analysis and resolution and production support Supported and configured Solaris 8,9 through Sun Jumpstart
• Installed operating systems and security patches
• Installed, and configured Apache, Tomcat & JBoss
• Installed Oracle WebLogic 10.x with SP5 Server and configured Domains, Admin and managed servers for applications to be deployed
• Provided support for the Oracle, and MySQL group, and business community
• Administered the UNIX System for clustered HP Servers with fiber attached SAN storage
• Configured volume groups and logical volumes, extended logical volumes for file system growth needs using Logical Volume Manage
• Installation, configuration and maintenance of Red Hat Linux servers
• Performed server installation on both physical and virtual servers
• System configuration/hardening by turning off unnecessary services
• Disk configuration, created and managed File Systems
• Created and managed user accounts, groups, access levels, permission, and SUDO
• Monitoring server performance of virtual memory, swap space, disk utilization and CPU utilization
• Checked server logs, trace files and file System, and back-end applications
• Script and automate server builds as well as repetitive tasks
• Created and maintained environment for running batch jobs associated with daily batch cycle and batch reporting subsystem
• Provided system analysis for server crashes, and provided resolutions to customers as required