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Sr Systems Administrator Resume

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Chicago, IL

SUMMARY

  • 8+ of extensive experience in Unix/Linux systems as a System Administrator on versions of RHEL 4/5/6/7, SUSE, CentOS and AIX 5.2/5.3/6.1/7.1
  • Implementing & troubleshooting NFS in Prod/ QA/ Dev environment.
  • Experience in System Administration Driver Configuration.
  • Experience in Virtualization Technology such as VMware, Virtual box and ESxi
  • Experience in working with Storage Area Network (SAN), EMC Clariion CX, EMC Symmetrix DMX, EMC MirrorView, HP Storage, and Hitachi data storage
  • Experience in installation and configuration of Hadoop cluster
  • Used cloud server instances and storage from Amazon AWS, Rackspace Cloud, and Linode, to enable client web applications to scale horizontally and vertically
  • Expert in load balancing techniques, puppet management and automating builds using Puppet.
  • Experience in creating Puppet manifests and software patch installation.
  • Wrote puppet manifests for deploying, configuring, and managing collectd for metric collection and monitoring.
  • Build automatic provisioning system with kickstart and Puppet.
  • Developed Puppet modules to automate deployment, configuration, and lifecycle management of key clusters.
  • Automated system configuration using Puppet.
  • Excellent in Configuring and Administering NFS, SMTP, DHCP, samba in heterogeneous environment.
  • Supporting Level2 and Level 3 for Datacenters contains 3000 + servers.
  • Coordinating with Vendor Support engineers to resolve high priority issues..
  • Setup and configure LDAP servers for home directory location and authentication.
  • Experience in networking (TCP/IP, Ethernet), NIS, DNS, NFS, DHCP, SMTP and RAID.
  • Resolving all software application problems in the production, test, and development environments.
  • Experienced with installation of packages, patches, maintenance & RPM updates on Red Hat Linux.
  • Extensively worked on Logical Volume Management (LVM) and disk space allocation per user (Quotas).
  • Proficient in Storage, Disk Management, Logical Volume Management (LVM) on P - series systems Precisely P770, P750, P720, P690, P650, P595, P570 and P520.
  • Configured services like DNS, NIS, NFS, LDAP, Send Mail, FTP, Remote access on Red Hat Linux.
  • Knowledge of Switches, Routers and Firewalls in Networking Area.
  • Custom build of Windows 2003 and Windows 2008 servers which includes adding users, SAN, network configuration, installing application related packages, and managing services
  • Strong analytical skills in both the technical and business arenas.
  • Quick learner, excellent problem solving skills, highly motivated and adaptable.
  • Strong Analytic ability and Capable of working in a large project Team.
  • Experience working with various tools such as top, nmon, vmstat, iostat, netstat, tcpdump etc
  • Provided production support in an on-call rotation in a 24x7 environment.
  • Extensively worked on Logical Volume Management (LVM) and disk space allocation per user (Quotas).
  • Proficient in Storage, Disk Management, Logical Volume Management (LVM) on P-series systems Precisely P770, P750, P720, P690, P650, P595, P570 and P520.
  • Configured services like DNS, NIS, NFS, LDAP, Send Mail, FTP, Remote access on Red Hat Linux.
  • Knowledge of Switches, Routers and Firewalls in Networking Area.

TECHNICAL SKILLS

Operating Systems: RHEL 4/5/6/7, Suse, Windows 2000/2003, Sun Solaris, IBM AIX 7.1, 6.1, 5.3

Hardware: IBM X Series, Dell, Fujitsu, IBM P Series.

Web/Application Servers: WebSphere Application Server 5.0/6.0,WebLogic Server, IBM HTTP Server, Java Script, JSP, Servlets, EJB

Databases: IBM DB2, Oracle 9i/10

Networking: TCP/IP, NIS, NFS, DNS, DHCP, SMTP, POP3, VPN, IMAP, SAN, NAS Cisco Routers/Switches, LAN.

Programming: C, C++, VB, HTML, Shell programming

PROFESSIONAL EXPERIENCE

Confidential, Chicago, IL

Sr Systems Administrator

Responsibilities:

  • Administration of RHEL 5/6 which includes installation, configuration, testing on both physical and virtual machines.
  • Monitored Linux servers for CPU Utilization, Memory Utilization, and Disk Utilization for performance issues.
  • Developed puppet recipes for automation of Hadoop Installation and configuration of nodes.
  • Wrote Puppet Manifest files to deploy automated tasks to many servers at once
  • Deployed Puppet for automated management of machine configurations.
  • Managed Puppet infrastructure through major version upgrades.
  • Refactored Puppet code to leverage new features.
  • Deployed Puppet for configuration management to existing infrastructure.
  • Maintained Puppet-based configuration management in operational and production environments
  • Capturing the image of production server, Configuring RAID and build the new server using the image on system imager server with PXE boot.
  • Updating YUM Repository and Redhat Package Manager (RPM).
  • Performing software installations using yum and RPM.
  • Installed and configured Veritas, Volume Manager Server to improve levels of centralization, control, automation, network manageability and protect data loss.
  • Created disk groups, volumes, volume groups, and RAIDs using Veritas Volume Manager
  • Administration and maintaining of Veritas Cluster Server
  • Create and maintain Datacenter, Cluster, Storage Domains using RHEV-M and Vsphere
  • Setting up cron schedules for backups and monitoring processes.
  • Installation and configuration of Redhat Device Multipathing.
  • Installation, Maintenance, Administration and troubleshooting of Linux and AIX.
  • Installed the Operating System on 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 iSCSI LUN boot instead of using local hard disks
  • Created File systems from local storage as well as NFS partitions for application portability.
  • Build LPAR system and Installed AIX 5.3 and 6.1 on LPAR using NIM Power 4, 5 and 6 systems and Upgraded Maintenance level as well.
  • Installed and verified that all AIX/Linux patches or updates are applied to the servers.
  • Used Korn Shell, Bash for scripting
  • Migrating the application from WebSphere to Jboss
  • Managing systems routine backup, scheduling jobs like disabling and enabling cron jobs, enabling system logging, network logging of servers for maintenance, performance tuning, testing.
  • Worked and performed data-center operations including rack mounting, cabling.
  • Installed, configured, and maintained WebLogic 10.x and Oracle 10g on AIX & Redhat Linux.
  • Configuring multipath, adding SAN and creating physical volumes, volume groups, logical volumes.
  • Installing and configuring Apache and Tomcat and supporting them on Linux production servers.
  • Troubleshooting Linux network, security related issues, capturing packets using tools such as IPtables, firewall, TCP wrappers, NMAP.
  • Preparing servers for Oracle RAC installation which includes tuning the kernel, agent installation, adding NAS storage.
  • Worked on resolving production issues and documenting Root Cause Analysis.
  • Monitored server and application performance & tuning via various stat commands top, vmstat, nfsstat, iostat, tuned I/O, memory, etc.
  • Configured volume groups and logical volumes, extended logical volumes for file system growth needs using Logical Volume Manager (LVM)

Confidential, Chicago, IL

UNIX Systems Administrator

Responsibilities:

  • Installation, Configuration, Maintenance and Administration of Red Hat Enterprise Linux 4/5/6 and Suse Enterprise Linux.
  • Knowledge of system security, system integration principles and technologies of multiple operating systems.
  • Gathering & Understanding the functional specification from the functional document.
  • Administrated DHCP, DNS and Samba services in Linux System.
  • Troubleshooting Day - to-Day issues with various Servers on different platforms.
  • Configuring Backup solutions on SAN/NAS storage.
  • Configuration, Administration and Maintenance of NFS, DNS, NIS & NIS+ on Linux Servers.
  • Installation, configuration, and administration of VMware, Solaris Zones, Containers, and Ldoms
  • Responsible for Patches for the operating system, building startup shell scripts, managing the automation of Cron jobs and managing file systems.
  • File system Administration, Setting up Disk Quota.
  • Implementing & troubleshooting NFS in Prod/ QA/ Dev environment.
  • Setup virtual host for new application setup and creating documents.
  • Working on evaluating new hardware and software.
  • Installed/setup and maintained Splunk app for various platform of Operating system.
  • Experience in System Administration Driver Configuration.
  • Familiarity with message brokers such as ActiveMQ and/or RabbitMQ.
  • Understanding of common data structures (arrays, hash tables, trees, linked lists).
  • Hashing and cryptographic techniques.
  • Configuring different systems such as: Oracle ASM (RAC), VCS and CFS, and middleware applications.
  • Provide remote support for Linux servers and maintaining SLAs, Performance tuning and enhancing.
  • Production Support for 600+Linux Servers
  • Customizing the applications according to the business requirements.
  • Involved in troubleshooting the performance issues related to web application running on virtual machines
  • Responsible for Connectivity Issues among various Servers and Switches and also responsible for installation of various hardware components on various servers.
  • Work with Onsite and Offshore development teams for application development and delivery.
  • Provide management reporting on daily/weekly/monthly basis.

Confidential, Dublin, OH

Unix Systems Administrator

Responsibilities:

  • Installation, Configuration, Upgrade and administration of AIX, RedHat Linux.
  • User account management and support.
  • Responsible for configuring and managing Level1/Level 2 issues on Unix servers and escalate to Level 3 team when needed.
  • Configuration and Administration of NIS environment.
  • Involved in Installing and configuring of NFS.
  • Installed, configured and managed VMware infrastructure (ESXI, Virtual Center)
  • Responsible for reviewing all open tickets, resolve and close any existing tickets.
  • Document solutions for any issues that have not been discovered previously
  • Ensure safe and secure backup and storage of organizational data and all the servers.
  • Evaluate IT equipment and plan for future hardware needs & software needs.
  • Ensure safe and secure backup and storage of organizational data.
  • Troubleshooting network problems such as routing, repairing systems in case of crash.
  • Installation of Technology levels/patches, APARs on AIX.
  • Performed routine checks on nodes by monitoring syslogs and error logs for system and hardware errors.
  • Managed mksysb backups, worked with backup team on data migration and disaster recovery related issues.
  • Configured SSH, Managed Logical volumes, file systems, paging space issues.
  • Monitored trouble ticket queue to attend user and system calls.

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