SUMMARY

• Motivated, enthusiastic, and pro - active System/DevOps Engineer with an excellent 'can-do' attitude and overall 8+ years of experience as Linux/Unix system administrator on Redhat EL 4.x, 5.x, 6.x, Debian, CentOS 4.x,5.x,Suse,Oracle Enterprise Linux, FreeBSD, Solaris 8,9,10 and VMware vSphere ESX/ESXi environment.
• 8+ years of experience administering RHEL, CentOS, Debian/Ubunt Linux and Solaris Systems; extensive background spanning a full range of systems and network administration, engineering, and support within retail, finance, government, and insurance industries.
• Organized, take-charge professional with exceptional follow-through abilities and detail orientation, able to plan and execute projects from conception to successful conclusions.
• Advanced knowledge and expertise in IBM, Dell and HP servers and systems, Cisco routers and switches, remote access technologies, and network infrastructure, security, and protocols.
• Experience and Familiar with Virtualization technologies like installing, configuring, administering VMware ESX/ESXi and Citrix Xen Server. Created and managed VMs (virtual server) and also involved in the maintenance of the virtual server.
• Extensive understanding of networking concepts, (IE. Configuration of networks, router configuration and wireless security, TCP/IP, VPN, Content Filtering, VLANs, and routing in LAN/WAN, Ethernet Port, Patch Panel and wireless networks.)
• Handling day-to-day User Administration tasks like adding, deleting and modifying user data and documenting all user data in a centralized location.
• Performance tuning of Linux machines in the environment by kernel parameter tuning, identifying process that hog the system resources and containing them.
• Experience working in customizing the Kickstart and Jumpstart scripts to automate the installation of various servers used for various internal projects.
• Proven track record of troubleshooting and resolving complex IT and networking issues; ensuring responsive, 24/7 support for hundreds of internal and external users.
• Natural communicator and team leader with strong motivational skills; regularly noted for customer service mentality and the ability to build relations with executives, managers, peers, clients, and users.

TECHNICAL SKILLS

Operating Systems: RHEL 4/5, Centos 4/5, Fedora 11/12, Solaris 8/9/10, Windows XP/Vista/7

Services: NFS, SSH, SFTP, FTP, rlogin, RPM, YUM, Samba, Auto FS, Telnet

Monitoring Tools: Tivoli, Nagios, Jira

Testing Tools: Nmap, Nessus, Saint, Nexpose, Hping

Languages: C, C++, HTML, Java Script, SQL, Bash, Python Scripting

Virtualization: VMware and VSphere 4.0/5.0/5.1, OpenVZ, Xen Hypervisor, Docker, LXC

Networking: TCP/IP, UDP, LAN, WAN, NIS, NIS+, DNS, DHCP, NAS

Filesystems: LVM, VxVM, SVM, ZFS, NTFS

DataBase: Oracle 8.x, 9.x, MS-SQL, MySql

Applications: Apache, Tomcat

Hardware: HP DL380 Gen5/6/7/8/9, HP C7000 Chassis, HP BL490c Blade Servers, IBM, DELL R720/730, Cisco

PROFESSIONAL EXPERIENCE

Confidential - Sacramento, CA

Linux/VMware Administrator

Responsibilities:

• Managed various servers using VMware vSphere ESXi 4.1/5.0/5.1.
• Responsible for installation and configuration of Red hat Enterprise Linux (RHEL6.3 and RHEL 6.4) in development and test environments on HP physical servers as well as Virtual Machines
• Designed, managed, implemented/ supported: Backup/Recovery/Archive, Security Startup/ Shutdown, Mass Storage (SAN/NAS), OS Installations/Patches, Hardware/Software installation, Batch scheduling, Data center Migration, Application and Server performance
• Worked on server hardening for: Linux, Red Hat Enterprise Linux 4/5/6, Windows server 2003/2008/2012.
• Installation of Patches on the servers which are running different applications
• Validate that the server is fully patched with all firmware and OS critical updates
• Troubleshooting, Patching, Upgrades and Back-ups when required
• Modify the Kernel Tuning parameters based on the application requirements
• Create users, manage user permissions, maintain User & File system quota on Linux servers.
• Configured Multipath for SAN .Recompile the RDAC driver once hardens the server.
• Performed server rack mounting and managed /retired old rack optimized servers
• Administered NFS Mounts
• Writing Shell Scripting for checking the security setting of the server and changing the server settings
• Acquiring & Initializing LUNs in clustered & standalone environments.
• Installation and configuration of Apache Web Server for Various intranet/extranet websites
• Configuring IP connectivity, routing, checkpoint firewall and network interfaces. Also maintaining network connectivity of servers.
• Implemented Network File System(NFS) for file sharing and network installation
• Day to Day activities included handling Security issues like stale UNIX account Cleanups, 90 day password changes, setting max age and min age, creating a list of umask permission for various users
• Responsible for backup of all servers and recovery of all servers
• Configured clustering by using Veritas Cluster Server (VCS).
• Managed Storage Area Networks (SAN). Managed nodes running under SAN environment through HACMP
• Tuning the kernel parameters based on the application/database requirement
• Collect and analyze current system settings. Evaluate, test, and deploy audit remediation settings.
• Monitor ticket queue to attend user and system calls, attend team meetings, change control meetings to update installation progress, and for upcoming changes in environment
• Documentation of all the steps done as part of the Server Hardening process
• Install ITCM agent after the Server Hardening process
• Implementation of Samba to help printing and file sharing in the mixed Environment

Confidential - Mountain View, CA

Linux/Vmware Administrator

Responsibilities:

• Administration and maintenance of Red hat Linux
• Worked on Oracle and MySqL Databases and performed performance tuning and troubleshooting.
• Worked on User administration setup, maintaining account, Monitor system performance.
• Activities include user administration; startup and shutdown scripts; crontab, file system maintenance, backup scripting and automation using Perl, shell scripting (bash, ksh) for Red Hat Linux systems.
• Experience in system Software installation and configuration of NFS shares, Auto-Mounter, DHCP and LDAP
• Created and modified Veritas Cluster Service Groups and managed switchover from node to node and just as importantly, from interstate primary and DR sites
• Manage logical Volume manager on Red hat Servers.
• Troubleshooting day-to-day server related issues and problems in terms of operating system, applications and network
• Configure RAID mirroring on Linux platform
• Maintained and monitoring System Activities like CPU, Memory, Disk and Swap space usage to avoid any performance issues
• Configuration and Administration of Load balancers and F5's, taking servers in / out of rotation.
• Installation of VMware ESX3.5.x4.0x infrastructure on Dell Power Edge Server and administration of VMs
• Experience in installing, integrating, tuning and troubleshooting Apache and Tomcat application server.
• Performed application installation and management on Linux servers for applications like JBoss 4.2.x, 5.x, Oracle
• Configuring, administering and trouble shooting of NFS, AutoFS (Direct and Indirect Maps), NIS (master, slave and client) and DNS in multi-platform networks.
• Worked on the configuration of mail server using Send mail 8.10.x, 9.x.
• Installation of SAMBA 3.3.x server for interface between Linux servers and Windows servers to share files.
• Install and configure SSH to enable secure access to the servers.
• Modified the Linux kernel to add tracing probes for Configuration access tool.
• Environment, Command line, Current working directory, root directory, executed command.
• Experience in Shell scripting bash to automate system administration jobs

Confidential - Frisco, Texas

Linux Administrator

Responsibilities:

• Handling tickets/requests using Service Now
• Perform root cause analysis
• Troubleshooting technical issues such as MAC address, NFS share, etc
• Used LVM to configure Volume Group, Logical and Physical Partitions and importing new Physical Volumes responsible for maintaining/building a test environment
• Backing up Linux file systems using Tivoli backup
• Created snapshots of virtual machines using VMware vCenter 5.0
• Setting up local and HTTP Redhat yum repository
• Applying OS patches/upgrades to maintain security level to RHEL 5.x systems
• Troubleshooting post patching technical challenges
• Provided on call support to application owners to ensure their services are running fine after patching
• Perform hardware and performance tuning and maintenance
• Day to day reporting analysis tasks
• Installation and configuration of HA environment using Veritas Cluster

Confidential, Annandale, VA

Field/System Engineer

Responsibilities:

• Implement wired and wireless networks for homes and small business establishments.
• Repair and troubleshoot hardware issues on servers and personal computers.
• Resolve Windows 2000/XP/Vista application problems(like Office, IE, Norton, ect).
• Provide remote desktop support using Microsoft and other VNC products.
• Implement, configure and troubleshoot servers, mainframes and personal computers
• Configure and Setup Cisco routers, Hotspot, and other Cisco devices
• Troubleshoot and resolve hardware(HP, Dell, IBM, etc) and software/OS(Windows, Linux, Solaris) problems across a multi- vendor environment.
• Troubleshoot, configure and install Network Storage Devices
• Manage/update tickets with ticket management systems like OSMQ, clarify and oracle(Road Warrior)
• Provide phone support to customers and co-workers.
• Development and execution of hardware service activities such as installation/relocation of machines and deferred maintenance to minimize interruptions to the system's operation.
• Deliver technical consulting services to customers such as quickstarts, operating system upgrades, patches, training etc.