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Sr. Red Hat Enterprise Linux/unix Systems Administrator Resume

Pittsburgh, PA

SUMMARY

  • Experienced Red Hat Enterprise Linux 4/5/6/7, AIX 5.x/6.x/7.x, VMware ESXi 3/4/5/6 Systems Administrator with Telephony based Technical Support to assist and provide clients with the best possible uptime and to reliable and accurate communication to get tasks completed.
  • Expertise in deploying various Red Hat Enterprise Linux/CentOS builds both Physical and Virtual on HP/CISCO/Dell Hardware running ESXi utilizing Satellite and Puppet/Cobbler servers.
  • Expertise in deploying AIX LPAR’s utilizing HMC, Power HA, VIOS and NIM to consolidate Older IBM Hardware.
  • Experience building and supporting large AIX environments using both NIM and HMC.
  • Experience installing, configuring and security hardening AIXand Linux servers, evaluated needs and installed appropriate recommended patches as needed.
  • Experience in OEL/RHEL Server provisioning, Upgrades, Patching, Configuration and Performance Tuning in Linux, and VMware environments.
  • Expertise in designing build/configure documentation related to Red Hat Enterprise Linux via Spacewalk/Satellite/Kickstart/Puppet/Cobbler servers.
  • Experience in configuring JVM heap configuration, thread pool and JDBC configuration to performance tune java applications running on IBM WebSphere and Oracle RAC/ASM file systems.
  • Expertise in day to day administration of EMC arrays VMAX3, XtremeIO, VMAX, with CISCO/Brocade fabrics switches to 2000+ Windows/Linux and UNIX servers using SMC, EMC Connectrix Manager and SYMCLI.
  • Expertise in migrating Solaris legacy servers, Zones, Logical Domains, LDOM’s from multiple datacenters to a centralized datacenter as migration projects.
  • Experience installing, configuring and hardening Solaris 9/10/11and Linux servers, evaluated needs and installed appropriate recommended patches as needed.
  • Expertise deploying and managing Veritas Volume Manager and Veritas Cluster Server (VCS) for disk partitioning and HA needs.
  • Experience replacing the disks (mirror) under VxVM, SVM (Solaris), LVM and ZFS, and attaching the mirrors back.
  • Expertise in Installation, Configuration, Integration, Tuning, Backup, Crash recovery, Upgrades, Patching, Monitoring System Performance, System and Network Security and Troubleshooting of Unix Servers.
  • Expertise in creating bash/perl scripts to perform change control automation, close the security ports and assist with daily duties for help desk teams.
  • Experience performing IBM WebSphere Application Server Administration and Oracle 11g tasks such as installation, configuration, monitoring and performance tuning to create a 3 - tier application suite.
  • Administered performance analysis using tools like Nagios, prstat, mpstat, iostat, sar, vmstat, truss, Dtrace.
  • Experience setting up IT AUDIT controls, protecting information assets, to meet ITIL, SOX, PCI compliance standards.

TECHNICAL SKILLS

Hardware: HP Proliant DL 585 G6/G7, HP C-7000, BL 460 G6/7Cisco UCS B200’s B250’s M1’s M2’s, Dell R-900, R-710’s

Server OS: Windows Server 03/08, Red Hat 4/5/6, SUSE 11.1

Virtualization: VMware ESXi 3.5/4/5 vSphere & Configuring DRS, HA, P2V.

SAN Tools: PowerPath, Navisphere, NetApp Filers, OnCommand ManagerEMX VMAX, VNX, Net App 6240s

Database: MSSQL, MySQL, Oracle

File System tools: LVM, Veritas Volume Manager

Network Servers: DNS, DHCP, NIS, NFS

Web Server: Apache & IIS

Scripting: Shell, Perl

PROFESSIONAL EXPERIENCE

Confidential, Pittsburgh, PA

Sr. Red Hat Enterprise Linux/UNIX Systems Administrator

Responsibilities:

  • Installed and configured several thousand Red Hat Enterprise Linux 5/6/7, CentOS 5/6/7 Servers in both CISCO UCS and HP C-7000 Physical Blades and VMware ESXi Virtual Environment.
  • Setup and Configured Red Hat Satellite, Spacewalk, Puppet/Cobbler and Kickstart Servers for Red Hat Enterprise Linux/CentOS 5/6/7 installs and RHN Push Updates.
  • Preparing servers for Oracle RAC installation which includes tuning the kernel, agent installation, adding SAN storage and help create ASM File Systems.
  • Setup PowerHA (HACMP) and also configured and maintain its environment
  • Setup and configure systemsnetwork setting up redundancy for network. Configuration is done using smitty tcpip
  • Created both regular LPARs and VIO LPARs. Performed installation, configuration and maintenance of the AIX operating systemsas well as software and applications installation.
  • Created PowerHA (HACMP) clusters and setup nodes priority list, setup Boot IP, Persistent IP, Service IP, concurrent volume group, resourced group configuration, setup heartbeat, setup failover policies.
  • Configuring and Administering SSH, SFTP, HTTP, SMTP, NFS, DNS, NIS, NIS+ and LDAP on OEL server environment.
  • Performance Analysis of resources like CPU, Memory, Disk and Swap from command line using commands like prstat, vmstat, sar, iostat, swap etc. and tuning of the kernel parameters for the better performance of the operating System and TCP.
  • Architect, engineer and consolidate the entire Environment from a Solaris 9/10/11 environment to a commodity based VMware ESXi based environment running RHEL 5.x/6.x and SUSE 10/11 on IBM/HP Blades.
  • Perform system administration duties, checking vulnerabilities for a mixed environment of Oracle Solaris 11 on Sparc T5-x, T4-x Servers as part day to day builds.
  • Build, configure and support Veritas Cluster Server (VCS) and Volume Manager Configuration, migration of groups and resources.
  • Root cause, triage analysis and problem management of migration processes and failures.
  • Responsible for granting UNIX access to cleared users, sudo permissions; ensure integrity and protection of customer's data.
  • Performed Data Center Migrations from Site to Site with multiple physical location, including a physical to virtual migration, utilization of Solaris Containers, Logical Domains, Zones, Zone clusters to migrate 2400+ servers as part of the site migration process.
  • Provide support to the Java development team to help develop Java based applications on IBM WebSphere Application Server.
  • Create and Setup monitoring bash shell/Perl scripts to monitor syste, resources, logs, disk usage, scheduling backups and restore.
  • Installed andmaintained EMC Symmetrix VNX/VMAX storage and CISCO MDS Switches for LUN masking and Zoning to OEL/RHEL Physical servers.
  • Create and Setup monitoring bash shell script to monitor system resources, logs, disk usage, scheduling backups and restore.
  • Responsible for capacity planning, design, install and configuration of newly provisioned HP-C7000 enclosures, ESXi servers running BL 460’s and BL620’s.
  • Worked with application developers to upgrade from PeopleSoft application servers in Demo and development environments on Oracle Linux 6.1 servers.
  • Installation of ESXi 4.1/5/5.1/5.5/6.0 Hosts, vCenter Server, vCenter update manager and administering VM’sacross 6 Datacenters running 8000+ VM’s.
  • Installation, Configuration and Administration ofVMwareESXi 4.1.1, VirtualCenter 4.1, as well as upgrading to ESXi 5.0/5.1/5.5/6.0 Virtual Center 5/6
  • Preserved OEL/RHEL Servers integrity and 99.99% ‘up time’ to minimize any negative impact to clients’ business

Confidential, Houston, TX

UNIX/LINUX Systems Administrator

Responsibilities:

  • Worked with a team of Datacenter Support to maintain OS and Hardware.
  • Build development Linux/LAMP servers including webservers, MySQL and Perl based solution to assist developers.
  • Maintain and deploy High End applications developed using WebSphere Application Server.
  • Provide support to the Java development team to help develop Java based applications on WebSphere.
  • Provide 24/7 support to Middleware application servers (Weblogic, Tomcat, JBoss), Webservers (Apache, IIS, Oracle IPlanet) and Database servers (Oracle RAC, DB2, MS SQL, MySQL).
  • Setup and configure AIX systemsnetwork setting up redundancy for network. Configuration is done using smitty tcpip
  • Created both regular LPARs and VIO LPARs. Performed installation, configuration and maintenance of the AIX operating systemsas well as software and applications installation.
  • Install Oracle Enterprise Linux directly on HP DL585/385 G5 Rack mount servers using PXE boot and ILO.
  • Build development RHEL servers including webservers, MySQL and Perl based solution to assist developers utilizing Kickstart/network boot process.
  • Install RHEL 5.x directly on HP DL585/385 G5/G6/G7 Rack mount servers using PXE boot and ILO.
  • Solve day to day troubleshooting related to Network, Resource Allocation and Resource Availability.
  • Maintained user account management, configured servers to register with Red Hat, Network (RHN) Satellite Server, monitored servers - workload assessment, service console monitoring.
  • Configure LVM, Multipathing HBA’s, LUNS, NIC bonding as part of a server build process.
  • Decommission and consolidate Solaris Zones and AIX LPAR’s into RHEL and SUSE based environment including migration of IBM WebSphere applications.
  • Responsible for the installation, configuration and support of VMware and the daily management/monitoring of the virtual environment.
  • Application Migration from physical to virtual/virtual to virtual platform.
  • Participating in 24x7 Production on-call Support of Windows Server/Linux and provided technical support to users at remote datacenters.
  • Build, configure and deploy VMs and Templates and cloning Virtual Machines.
  • Implemented resource pools to divide the VM’s according to their resource requirements.
  • Maintained user account management, configured servers to register with Red Hat, Network (RHN) Satellite Server/Spacewalk, monitored servers - workload assessment, service console monitoring

Confidential, Houston, TX

UNIX/Linux Systems Administrator

Responsibilities:

  • Assisted various senior level linux architects in installing, configuring and managing Red Hat Enterprise Linux 4.
  • Create and Setup monitoring bash shell script to monitor system resources, logs, disk usage, scheduling backups and restore.
  • Resolved and completed various maintenance tasks on UAT/Production servers and Apache software issues.
  • Setup environment based sudo permissions to allow developers to perform day to day activities including running start/stop scripts in development environment.

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