SUMMARY

• 7+ years of extensive Linux/Unix and Windows Systems Administration experience.
• Managed sever farm consisting of 300+ Rack optimized and Blade Center Linux Clusters.
• Strong experience with VMWareESX 3.0 and Vsphere.
• Significant experienced on architecting Servers, Storages, Networks and Data Centers.
• Knowledge and understanding of network infrastructure systems (routing, switching, load balancing, or firewalls) and internet technologies.
• Extensive knowledge of Linux HPC clusters, hardware, network fabric and storage servers.
• Provided cross platform data access solutions to customers.
• Experienced managing UNIX flavors such as AIX and Sun Solaris.
• Supported geographically diverse customers and teams in a 24/7 environments.
• Improved system availability by installing Nagios Monitoring tool.
• Supported Infrastructure services such as NFS, FTP, DHCP, DNS, NTP, Samba, VNC, and SSH.
• Improved system availability by installing Nagios Monitoring tool.
• Installed & configured Veritas storage foundation such as VCS, VxVM, & VERITAS Netbackup.
• Support and maintain of HP Proliant DL Series, C7000,C6000,HP BL20,BL40 generation 2,3,4 HP PA - RISC, IBM Xseries, HS Blade Centers & Sun Ultra Enterprise Servers (E3500, E4500, E450, E420R, E250), SunFire (6800/4800/3800/ v880/280R) and Sun workstations (Ultra 5, 10, 20, Blade 100,150, 2000) in a NIS, NFS, and DNS environment
• Experience in configuring Raid-0, Raid-1, Raid-5, ISCSI, IDE, SATA, and creating Logical Volumes, Logical Volume Groups and manipulating them as required.
• Extensive multipathing experience using MPIO, PowerPath and Veritas DMP.
• Experienced with SAN/NAS storage environment.
• Ability to analyze complex problems, interprets operational needs, and develops integrated, creative solutions
• Strong knowledge of TCP/IP networking
• Strong familiarity with Shell and scripting.
• Excellent Communication and Customer Support skills

TECHNICAL SKILLS

Operating Systems: RHEL 3.0, 4.0, 5.0, SuSE Linux Enterprise Server 9, 10, Sun Solaris 8, 9 and 10 Windows 2003, 2008, AIX 5L

Programming Languages: C, C++, Perl, Shell, MySQL, Oracle, and SQL.

Unix Services & Tools: DNS, DHCP, NTP, HTTP, ssh, rsync, grep, scp, awk, cvs

Storage Technologies: NetApp NAS, Snap Mirror, VeritasNetBackup, Volume Manager

Virtualization Technologies: VMWareESX Server and Vsphere, VMotion, Xen

HPC Cluster Technologies: Nastran, Fluent, Infiniband, GPFS, PBS, Torque and Maui, MPI, OpenMP, PGI, Pathscale, Nagios, Ganglia

PROFESSIONAL EXPERIENCE

System Admin

Confidential, San Jose, CA

Responsibilities:

• Setup UCS box in built room load different OS according to requirement (configure stand alone or Rack depending on requirement)
• Configuring servers and setting up File systems, managing Disks space, space cleanup as required, Clean setting up and troubleshooting networks issues like NFS/DNS/DHCP
• Set up and configuring of linux and HPUX (90% Linux /10% HPUX) servers/workstations for clients
• Trouble shooting system - OS level and Hardware level.
• Working with users to understand detail service delivery requirements and system functionality and support their requirement accordingly.
• Worked closely with DBAs, client teams and management ensuring that systems are managed per established service level agreements.
• Managing Remedy Queue to assign tickets according to level of expertise required and resolving the cases to resolution for cases who’s ownership is taken
• Refresh/copy databases using Unix commands & scripts (ART- tool using DD commands on backend) every quarter on stage and development servers from respective DR of that Data Base.
• Tested and documented new process for Refreshing Stg and Dev DB on NettApp SAN using Flex-clone and Lun-clone storage technology.
• Re-firing Backups, Modifying backup config file (i.e implementing various changes advised by DBA ) and solving various backup related issues on DBBS(Data base backup systems).
• Create User id and adding them to respective groups to get access to the security servers depending on validation of justification from client.
• Timely Patching (Linux(CEL)/HP) servers to keep them aligned with service level agreement and remove bugs due to earlier patch bundle.
• Performed symcli upgrades on all the server to enhance control on EMC SAN devices using symcli commands.
• Performed NAS(Filer) migrations, SAN migration(HP/Linux/Solaris) for Frames getting Decommissioned.
• Used Open-migrator to migrate data from old devices to new devices on newly allotted frames for migration.
• Tested and implemented Open-replicator as Confidential standard tool for SAN migrations.
• Support Firmware upgrade and various other change request(adding CPU to virtual) for UCS box and virtual’s.
• Testing and coming up with new method to scan storage in Linux to avoid incidents which caused unplanned reboots on host.
• Tested and Certified new Remedy tool for raising CR(maintenance change request tool) as per Confidential standard.
• Virtual host migrations to keep the virtual hosts to latest kernel version to co-host EMC and NetAPP SAN.
• Driving the project for P2V (Physical to virtual) transitions.
• Driving the project to backup required OS configuration, kick start the host to install new OS version(Rhel 5.5) and restore the configuration files post upgrade and making sure all services are fully functional post upgrade.
• Solaris/HPUX patching and Veritas upgrade to keep the system bug free with latest security patch as well as keep them in vendor supported patch level.
• Storage Provisioning, Volume and File-system Management using LVM on linux in a heterogenous SAN environment (EMC /NettApp) and using Veritas on SUN OS.
• Driving OEM project (i.e creating a mount point across the data center to help DBA monitor and take necessary action depending on the alerts).
• Driving a Non-reboot patch project where all rpm packages which don’t need services to restarted are updated( effectively reducing the downtime while patching system with reboot patch where new kernel is built).
• Leading team for supporting Unix/linux related Escalations and H/W break fix cases.

Systems Admin

Confidential, NJ

Responsibilities:

• Built Linux Compute Nodes using automated scripts (Kickstart scripts) and NFS server.
• Provided cross platform data access from Linux to Windows users by deploying Samba.
• Managed Users on Unix/Linux systems,
• Provided application support for various Engineering applications such as Ansys and Abaqus.
• Architecture& implemented DAS storage for Linux & Windows on Dell MD3000 Disk arrays.
• Installed and configured remote graphics software.
• Gathered requirements from Engineering team and build application installation documents.
• Validated the Engineering requirements with Process Improvement teams.
• Managed Nodes, jobs and configuration using HPC Cluster Manager Tool
• Provided support to CAE/FEA applications such as Nastran, Patran etc.
• Helped troubleshoot engineers with Non-linear FEA startup files and database files.
• Installation, Maintenance, Administration and troubleshooting of Sun Solaris, AIX, HP-UX, Linux.
• Performed automated installations of Operating System using Jumpstart for Solaris and kickstart for Linux.
• As a Solaris administrator primary responsibility includes building of new servers which includes rack mounting, installation of OS, configuring of various OS-native and third party tools, securing of OS,
• Installing & configuring, job scheduling.
• Installation and configured Solaris 10 with Zone configuration
• Extensively worked on hard disk mirroring and stripe with parity using RAID controllers.
• Involved in Server sizing and identifying, recommending optimal server hardware based on User requirements.
• Installation and configuration of Veritas Volume Manager, LVM, Veritas File System and Veritas Cluster Server.
• Installed the Operating System on Solaris and Linux servers and blades over the network.
• Built servers according to standards specified as per individual applications.
• Built virtualized Linux servers on ESX and blade servers to host multiple applications on same chassis across different server hosts.
• Set up Linux servers for iSCSILUN boot instead of using local hard disks.
• Set up Sun servers for SAN-through-FCP boot as against booting from internal hard disks.
• Configured Sun servers M4000 and M5000 for operational readiness upon OS installation.
• Set up Linux servers for LAMP implementations and readiness.

System Administrator

Confidential, Renton, WA

Responsibilities:

• Created a PXE Boot environment with all the necessary services such as DHCP, TFTP, PXE, OS image sources for four different OS versions.
• Acted as a Liaison between the Customer and the Project Team.
• Planned, designed and implemented servers and network for engineering test applications.
• Configured the Remote Console service to the servers.
• Created Kickstart scripts as per the user requirement and performed few test deployments.
• Assigned the Server Build Tasks, DHCP Management, Kickstart Modifications and OS image Management to each team member.
• Validated the servers to check they meet the customer requirements.
• Provided application support for Patran and fluent.
• Created Virtual machines on VMware ESX 3.0 for Windows and Linux clients to perform Integration Testing of Switch components.
• Creation and scheduling of Cron Jobs such as for Backup, System Monitoring and removal of unnecessary files
• Performed automated installations of Operating System using Jumpstart for Solaris and kickstart for Linux.
• Develop, Maintain, update various script for services(start, stop, restart, recycle, cron jobs) Unix based Korn shell, Bash.
• Updated & Running the various source code for migration & updating follow-up the release management.
• Configured NIS Master and Slave servers and NIS clients.
• Engaging and working with different vendors to determine problem resolution and root cause of hardware problems.
• Installation, Configuration & Upgrade of Linux, Solaris, AIX, HP-UX and Windows operating system.
• Maintaining the server farm of around 500 + Solaris, HP-UX, AIX and Linux servers and resolving the trouble tickets.
• Installation of Patches and Packages.
• Configuring NFS, NIS, NIS+, DNS, LDAP and disk space management on SUN servers.
• Installing & configuring Solaris 8, 9, 10 using Jumpstart, HP ITANIUM and PA RISC boxes using IGNITE
• Worked on Data Center Migration Project. Migrated Linux/Unix Servers from one data center to other data center with minimal downtime.
• Extensive working experience in process scheduling, disk and file system I/O, kernel internals, TCP/ IP networking.
• Implemented SUDO, SSH and other security tools and implemented SOX (Sarbanes Oxley) security compliance.

Systems Administrator

Confidential, Santa Clara, CA

Responsibilities:

• Administered Linux clusters consisting of 96 nodes running either Red Hat and SuSE.
• Added new nodes to the cluster, updated the nodes with patches from RHN and satellite server
• Applied patches, installed monitoring tools, upgraded BIOS on HPC Clusters.
• Provided Application support for Computational Chemistry projects on tools such as Jaguar, Moab, ganglia and visualization.
• Installed and configured Ansys Fluent for customer.
• Created Puppet manifests maintain customer application data.
• Schedule users to perform High Performance Computing activities on the Linux cluster.
• Managed software Licenses using flexlm.
• Managed Database servers running on Sun Solaris 10 on Sun v480.
• Installed and configured Nagios monitoring tool to manage infrastructure.
• Applied patches and supported Solaris 9 for Oracle Database servers.
• Installed Sun Solaris 10,Veritas Cluster Server.
• Performed Kernel tuning and Kernel patching.
• Monitored System Performance, Tuned and optimized systems for better performance.
• Managed Disk using LVM, resized disk space when required. Managed disk space from NetApp filers
• Setup NTP server and synchronized clients with NTP server.
• Troubleshoot application problems by diagnosing the coredump, diskdump, and netdump
• Provided 24/7 support coverage, pager support and weekend support.
• Configuration of NIS, NIS+,DNS,NFS, Sendmail, Samba, Apache for multiple environments
• Monitoring System performance and do kernel tuning to enhance the system Performance.
• Setup and maintained DNS Primary, Secondary, Cache-only servers, DHCP servers and DNS clients.
• Configured various services, devices as well as applications of UNIX servers and worked with application team to customize the environment.
• Managed physical and Logical volumes, Volume Groups etc. in Linux.
• Extensive working experience in process scheduling, disk and file system I/O, kernel internals, TCP/IP networking.
• Application & Production Support(Bridge Call 24/7)
• Installations of Peripherals - Fax/ Modem, Printers, Scanners, Tape and Zip Drives, Multimedia and PCMCIA cards.
• Installation and support of all Application Software in Windows environment.
• Desktop support provided to end users installation of windows 98/2000.
• Ensure that all computers are in perfect operating condition at all times.
• Establish security and control measures on the use of computers.
• Follow up change management procedure & implement the documentation standard as per requirement.
• Actively involved in technical discussions to provide/design solutions for various application teams.

Unix/Linux Systems Administrator

Confidential, Pittsburgh, PA

Responsibilities:

• Administer and Support Linux (RHEL 4.0) and AIX servers for Non Production, Test Dev environment.
• Install and setup System Integration SIT and User Acceptance Test UAT and Development Environments.
• Applications supported on the above servers are Apache/Tomcat.
• Performed Jboss Administration for Dev and Test Environments.
• Configured SAMBA between the Linux and windows servers to provide directory sharing capability among Linux and windows servers.
• Performed System migration and application backup and restore for Financial Package Application Servers.
• Setup and manage DNS and DHCP Servers.