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Sr. System Administrator Resume

5.00 Rating

GA

PROFESSIONAL SUMMARY:

  • Around eight (8) years of experience as a RHEL 3.0/4.0/5.0/6.0 , SLES 10/11 & Unix IBM AIX 7.x Power7,6 platforms System Administrator.
  • Experience in planning, installation, migration, upgrade OS (AIX, Solaris, Linux), deployment, Production Support.
  • Expert in Red Hat Linux V5 & 6 of heavy experience in install / rebuild servers. Understanding the business requirements, capacity planning, Vendor management, team co - ordination, business migration. Patching and Packages rollouts.
  • Excellent understanding of ITIL v3 and experience with creation of runbooks.
  • Work with Engineering groups, Web Commerce Group, to plan, design, scope and implement development projects on pre-production as well as production systems.
  • Administer and deploy RedHat (Linux) & Aix servers (Stand alone, via VMWARE and TPM) in Datacenter as well as from business prospective.
  • Installing and configuring various services like DNS, DHCP, NFS, Sendmail, Apache Web Server, Samba, SSH, http, RPM, package management.
  • Extensive experience in configuring Global File System(GFS) and Zeta byte File System(ZFS).
  • Experienced in OS (Solaris, Linux, AIX) level patching and level recovery.
  • Thoroughly documents the steps in the implementation of a task.
  • Experienced in Apache/PHP/MySQL/Postfix/Sendmail/DNS/BIND.
  • Knowledgeable in Networking and Network Switches.
  • Experience in Configuring and Managing VPLEX local/metro using VPLEXCLI and Management Console.
  • Created/written backup scripts to transfer the XEN virtual machine images to DR site.
  • Experience using Datascan technologies to handle the weblogic server images that are transferred to the Disaster Recovery sites.
  • Setup and configured Apache in Redhat.
  • Installing KVM (Kernel Virtual Machine), configuring KVM Virtual Network, creating KVM Networked Bridge Interface, creating KVM Virtual Machines.
  • Expertise in configuration Management using CVS, SVN and well versed in code management using Repositories.
  • Experience in Linux and Solaris Virtualization implementations such as VMWare and Solaris Zones/Containers & LDoM's.
  • Experinced in supporting Red Hat Satellite server, RHN.
  • Strong knowledge in DNS, DHCP and IP addressing. Experience administering Active Directory and group policies.
  • User account Management in a Complete NIS environment, pushing maps to NIS slave servers with all the user home directories in auto mounted production systems.
  • Expertise in systems performance monitoring & tuning: CPU, disk, memory and network utilization
  • Set up the satellite server and planned for system updates.
  • Experience working on boot loaders like GRUB and LILO and also upgrading Kernel on Redhat Linux servers.
  • Experience in troubleshooting and resolving network issues related to the servers.
  • Expertise supporting and installing third party software on workstations.
  • Extensive knowledge of NIM, Jumpstart, Kickstart.
  • Experience migrating applications from 4 to 5 and to 6 (manual upgrades).
  • Experience in creating VM for Linux, Windows and Solaris. LVM, ZFS and zone management.
  • Extensive knowledge of Spark enterprise servers, HP and IBM servers.
  • Knowledge of KVM, Management console management and working knowledge on PERL scripting.
  • Experience in Veritas File system, Volume Manager, SAN (EMC & IBM TotalStorage DS4000/6000), Legato Backup, Veritas Netbackup, TSM and Capacity Planning / Performance and Tuning.
  • Experience on defining and enabling Service Management, Change Management, Knowledge Management, Demand Management and Capacity Management.
  • Strong knowledge of Korn Shell scripting.

PROFESSIONAL EXPERIENCE:

Confidential, GA

Sr. System Administrator

Responsibilities:

  • Capably handled UNIX administration experience using operating systems like Red Hat Linux Versions 5& 6
  • Build new servers for project needs on AIX 6.1 using VIO server and NIM on Power 7 frames.
  • Worked of critical project for core banking and New servers built and decommissioned of server project
  • Conducting security audits, including vulnerability scanning and system security checkouts for pci
  • Remediation system-based vulnerabilities identified from vulnerability scans.
  • Worked with the security team on regulatory and compliance, such as PCI, ISO, & SSAE16
  • Administration on risk analysis of Vulnerability scanners (Qualys), and incidents
  • Gained experience working in compliance with security standards such as PCI, SSH as well as General Computing Principles
  • Configure OpenSSH for secure and encrypted connection over the network
  • Design patch-management solution for Linux infrastructure, manage the rollout
  • Administrator of Unix, AIX, Sun Solaris, SAN, Linux, HP-UX and Windows Server systems.
  • Dexterously set-up governance structures & processes around SSH keys set-up and upgrades in accordance with compliance & security standards set by the firm
  • Experience working with HP Service Manager for Ticketing system and HP Server Automation
  • Successfully worked closely with development & production support teams in order to ensure operational requirements are met
  • Patching, User Administration, Security on RHEL 5/6.
  • Configuration & Installation of Red hat Linux 5/6 by using Kick Start, Jump Start and customized scripts.
  • Installation and configuration of NIM master server and clients.
  • Upgrade microcode of frame, fiber channel adapters etc.Maintaining Patches and Packages to keep the servers up to date with latest OS versions
  • Capably made sure all the critical & major incidents are addressed within SLA response & sent out critical alerts for such incidents
  • Performed migrations with the TL upgrade as part of data center optimization
  • Created and Managed LPAR's, Dynamic LPAR on different IBM servers like p550, p570, p590, p595, p630, p650, p670, p690 and p770.
  • Installation, configuration and administration of VIO server (dual) and VIO client LPAR'S via HMC and configuration of the Virtual adapters (vscsi adapters and fcs adapters and shared Ethernet adapters)
  • Installed and build from scratch, complete NIM Setup; added different clients to NIM server and their Backup.
  • Administration Task’s included User administration, Performance management and tuning, network configuration, disk management, LVM, file system management and problem investigation and troubleshooting.
  • Maintained system backups using mksysb and Used monitoring tools like NMON and Topas.
  • OS Migration from AIX 5.3 to AIX 6.1 using mksysb using NIM servers.
  • Configured Volume Groups (VG) and Logical Volumes (LV), extended logical volumes for file system growth needs using Logical Volume Manager (LVM) command
  • Responsible for NIM installation, setting up NIM servers, clients, define the resources, Alternate Disk Migration with NIM.
  • Installed and upgraded different versions of ssh/ssl. on both AIX & Lnux boxes
  • Installation of Red Hat Linux OS using NFS, FTP,CD-ROM and Hard drive & did NFS mounts
  • RPM package creation for Ticketmaster proprietary software. Red Hat Package Manager spec file creation
  • Installed patches and performing upgrades like maintenance level upgrades, firmware, kernel and memory upgrades
  • Configured volume groups and logical volumes, extended logical volumes for file system growth needs using Logical Volume Manager (LVM) commands.
  • Competently managed & supported service incidents either personally or via Change management through towards successful completion and user satisfaction

Environment: LINUX, AIX, Solaris, EMC Storage VMAX, Symmetrix, Clariion, VNX, CISCO switches and routers, HP Blade Center, IBM Blade Center, Kickstart, Chef, NIM, VIO servers, NFS, Oracle, Websphere.

Confidential, CT

Linux Administrator

Responsibilities:

  • Migration of applications from older Sun/Solaris hardware over to HP blade environment running RedHat Linux (RHEL4, 5, and 6. P2V migrations of hardware servers to VMware environment running on ESX V4.1 servers (HP Proliant hardware). Ongoing maintenance and support of several hundred Solaris and RHEL servers, operating with a wide variety of applications, running on both physical and virtual machines.
  • Administered Linux servers for several functions including managing WebSphere, Apace/Tomcat server, mail server, MySQL database, SVN, build and firewalls in both development and production.
  • Use strong Linux and Windows Server Administrator skills to accomplish website migrations setup, and restore websites and troubleshoot hardware and software issues as they arise.
  • Upgraded Solaris 8 and Solaris 9 to Solaris 10 using Live migrations.
  • Worked on YUM configuration.
  • Creating profiles in Puppet and pushing them across all the servers in Unix and Linux environment.
  • Setup and configured Apache in Redhat
  • Troubleshooting Apache issues such as performance testing and tuning (i.e. worker, pre-fork, mpm configuration), failure of Aapche to restart, queuing of requests, etc.
  • Perform multiplatform volume management using SVM, LVM, ZFS, NAS, and VERITAS volume manager. .
  • Red Hat Linux server administrator, including security patching, kernel tuning, RAID disk array mgmt, software packaging and installation using RPMs.
  • Performing regular function checks on all RHEL 5.5 Linux Servers in both environments (Production/Non-Production and/or Production/Development) especially on Apache servers.
  • Customize the migrationlife cycle concepts and implement the best practices that ensure quality standards and less downtime through the process.
  • Associated for running jobs for migrating different client application servers from Solaris to Linux Environment.
  • Involved in Raising service now tickets for creating repositories. Daily kickoff call with team and getting project migration information.
  • Perl and shell scripts to collection and summarize server information for server monitoring improvement project.
  • Using Puppet for pushing server configuration across distributed virtual server environment. Performance enhancement and tuning for Tomcat, Apache and JBoss servers on RHEL6 OS virtual instances. Writing Build and Build deployment scripts.
  • Performed data migration across multiple UNIX/Linux(RHEL/OEL/Solaris/HPUX) servers, and Windows Servers.
  • Change root password on all server from centralized Puppet master server.
  • Used Puppet Master to keep in sync configuration on hosts running agents.
  • Upgraded and maintained software packages on servers using RHEL Satellite and Repository servers.
  • Build new Virtual machine and physical server.
  • Managing the VMware ESX and ESXi server 5.5, 5.1, 4.0.0 and 3.5.0 based on requirement.
  • Installing and Managing Virtual Center 5.5.Upgrading from VMware ESX server from 3.5.0, 4.0.0, and 5.0 in environment.
  • Install and configure the hardware agents on the ESX servers for Hardware monitoring and alerts (SNMP & Open Manager).
  • Installed packages using YUM and RPM.
  • Frequently checked ESX server logs for any problems and troubleshoot whenever necessary.
  • Monitored Hardware console for any hardware issues. Troubleshoot any operating systemissues.
  • Worked with application team in resolving any issues related application installed on the servers.
  • Created Root Cause Analysis (RCA) for any server outages and server problems.
  • Monitored ESX server alarms and VM's alarms and acted on those incidents to resolve.
  • Created change tickets for the changes made on ESX servers and guest OS
  • Used VMotion to Hot and Cold migrated VM's from one ESX server to different ESX server.
  • Implemented V2V and P2V conversion using VMware Converter.
  • Proper power down and up process during Maintenance of ESX hosts or power outage.
  • Taking Snapshots in the environment. Creating templates as per various business requirements.
  • Coordinating with various vendors for hardware related issues.
  • Adding new user and assigning permission and shared resources rights.
  • Managing and troubleshooting AD users login problems.
  • Attend team meetings, change control meetings to update configuration / installation progress and upcoming changes in environment.
  • Creating Change Controls, Resolving Incident Tickets and Problem Tickets using Service-Now ticketing tool, and ability to multitask in a fast paced environment under strict SLA and resolve Production Incidents with minimum impact.

Environment: Red Hat Linux 4/5/6, VMware, Solaris 8,SVN, SUN FIRE 6800/E6500/E4500, Service-Now, Hp Blade Center, IBM Blade Center, Sun Sparc1000, IBM RS/6000, Disk suite, HPUX, ESX, LDAP, DNS, NIS, NIS +,SNMP, Shell scripting, Apache, Puppet, WebSphere, Sun and Veritas Clusters.

Confidential, Boston, MA

Linux Administrator

Responsibilities:

  • System Administrator/Integrator role in a large team responsible for maintaining of Linux operating systems such as RHEL,CentOS,Ubuntu and SUSE 10/11.
  • Creating and testing documentation for customers
  • Used KVM in server builds and used as KVM hypervisor to manage VMS and associated resources
  • DNS lookup and fail over in build process.
  • Testing and troubleshooting database related errors like user profiles/settings, connection issues and foreign key dependency issues.
  • Creating/editing Install/Upgrade scripts to manage rpm’s non-conventionally (selective backup and restore of rpm during upgrade).
  • Working with rpath, creating and managing isoTesting Settings and configurations for different customers using simulators and available in house hardware.
  • Working with DNS based architecture, in depth knowledge of name service, master and slave configuration, centralized images from the rbuilder server. Importing release rpm database into rpath appliance and managing recipies.
  • Working with VMware 4.0,5.0 extensive creation and management of virtual servers and managing resources. Addition of datastores and upgrading the vmware box to 5.0.
  • Perform timely Patch management as per the Schedule in windows.
  • Creating and managing network routing characteristics for a multipath environment.
  • Troubleshooting and analysis of hardware and software failures for various Linux servers (core dump and log file analysis). Managing spfile and pfile for performance tuning.
  • Experience with webserver configuration like Apache &Weblogic on both Linux & UNIX.
  • Configure and maintain VMware with updates and devices managemenet.
  • Created mount points for Server directories, and mounted directories on the Servers.
  • Managed shared NFS files system, mounting and unmounting NFS server, NFS client on remote machine, sharing remote file folder, starting and stopping the NFS services.
  • Alerting and monitoring with help of devops.
  • Installed patches and Packages as needed, installed and configured new hard drives and memory.
  • Performed Performance Monitoring & Tuning - iostat, vmstat&netstat, nfsstat.
  • Performed patching, backups on multiple environments of Solaris and Linux.
  • Managed file permissions & ownership for important directories & files.
  • Administration responsibilities include user, group, disk, and security management, File sharing Permissions.
  • Tied together disparate pieces to build a fully automated bare-metal to production server build system using RequestTracker(RT) with the AssetTracker plugin as the system of record. DNS, DHCP, kickstart, and puppet tied into the system.
  • Performed Installation, Upgration, Patches, Migration, Configured, Troubleshooting, Security, Backup, Disaster Recovery, Performance Monitoring and Fine-tuning on UNIX (SUSE Linux, SUN Solaris 10, Red Hat Linux)Systems.
  • Experience in writing monitoring/start up shell scripts for unix and Linux
  • Deploy the latest version of open Stack
  • Managing change with mercurial Queues.

Environment: Solaris, AIX 5.X/6.1/7.1, RHEL 5/6, Weblogic, Websphere, Oracle, DB2, cisco and Brocade switches and routers, Appace, Tomcat, IBM, Hitachi, EMC storage.

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