SUMMARY

• Over 7+ years of IT industry experience as a SystemAdministratorand Production Support of various applications Red Hat EnterpriseLinux, UNIX and Windows environmenthosted on - prem Datacenter and on Azure/AWS public Cloud.
• Experienced in Installs, Upgrades, Patches, Configuration, performance tuning on UNIX and system software & hardware
• Extensive experience in performing System Integration/Administration for Microsoft Windows 2003/2008/2012/2016/2019 Servers, Windows 7/ Windows 8, 10 Red HatLinux.
• Experience in Installing, configuring and maintaining Samba, Web Sphere & Web Logic Application Servers, Nagios and Chef.
• Efficiency in installing, configuring and implementing the LVM, and RAID Technologies using various tools like Veritas volume manager, Solaris volume manager.
• Implemented day-to-day tasks in Red Hat Linux including upgrading RPM's, Kernel tuning, HBA Driver, configure SAN's, Multipathing and Logical Volume Manager LVM and Automation in CI/CD
• Virtualization of an operating system, servers and network resources. (Ldom, zone)
• Disk space and File system management using VERITAS Volume Manager, Solaris Volume Manager, and Logical Volume Manager LVM and RAID Volume Management.
• Performed automated installation of Operating systems using kickstart forLinuxand Jumpstart for Solaris.
• Experience in administration and maintenance of application services like DNS, DHCP, FTP, LDAP, and NFS.
• Experienced in installation of Operating Systems, Packages and Patches, adding Peripheral, maintaining user accounts, System Security, backup/recovery, performance tuning, troubleshooting at various levels and having knowledge on retail/e commerce domain.
• Strong analytical, diagnostics, troubleshooting skills to consistently deliver productive solutions, with debugging an operating system issue inLinuxsystem.
• Supported technologies, such as Active Directory Federation Services, Azure Active Directory, Azure cloud migration/ deployments - Azure SQL and PowerShell.
• Greatly worked with AWS for deploying EC2 instances consisting of various flavors such as Ubuntu server, Amazon Linux AMI, SUSE Linux, Red Hat Linux Enterprise, and Microsoft Windows Server.
• Experience in System Administration, System Builds, Server builds, Installs, Upgrades, Patches, Migration, Troubleshooting, Security, Backup, Disaster Recovery, Performance Monitoring and Fine tuning on UNIX and Red Hat Linux Systems.
• Experienced in Python and Shell scripting to automate the provisioning and deployment. Implemented continuous integration using UDeploy. Good experience on DevOps tools
• Developed tools to automate manual tasks using shell scripting, Python and integrated them inCI/CDpipeline through Jenkins.
• Worked with Ansible playbooks for virtual and physical instance provisioning, configuration management, patching and software deployment. Experienced in shell scripting using ksh, bash, perl, Ruby and python to automate system administration jobs.
• Ability in execution of XML, BASH, Shell Scripts, Perl Scripts, Ruby scripts, Python Scripts and JAVA Scripts.
• Integrated Jenkins with various DevOps tools such as Nexus, SonarQube, and Chef etc.
• Strong experience as a LINUX/UNIX System Administrator and Production Support of various applications on SUN Solaris, Red Hat Linux, and Windows environment.
• Host -level troubleshooting of storage using EMC tools as well as nave Red Hat EnterpriseLinux5/6/7/8 multipath.
• System administration including configuration of server-based systems, system installation and configuration fundamentals of security, and installing third party software
• Configuring and Administering DNS, NIS, NIS+, LAMP and LDAP on Sun Solaris server environment.
• Configure physical and virtual machines, including VMware 5.x, 6.x guests and HP Integrity Virtual Machine hosts and guests.
• Service Guard cluster installation and configuration for stand alone, local and site-to-site clusters including Oracle RAC.
• SAP and Oracle pre-installation scripts and packages.
• Perform server installation, configuration, performance tuning and production support forLinux/Unix systems.
• Troubleshoot issues with UNIX /Linuxinstall scripts. Migrate existing servers to new networks and/or domains.
• Resolve network, software and hardware issues with newly built servers.
• Capable of prioritizing and managing high volume workloads from Red Hat hosts.
• Implemented CI/CD automation process using various tools like Jenkins, and Puppet to ensure shortened deployment cycles.
• Working knowledge with shell scripting using Bourne Again Shell (BASH), Puppet, and Nagios.
• Experience in Installation of VMware ESX server and creation of VMs and install different guest OS.
• Experience in Installation and configuration of Zones and Containers in CentOS/RHEL environment.
• Experience in Creating and maintaining user accounts, profiles, security, rights, disk space and process monitoring.
• Experience in Veritas Volume manager (VxVM), Mirroring, and striping, Parity, New File Systems, Mounting and Unmounting File Systems.
• Resolving system errors and crashes, huge file sizes, file system full errors.
• Experience in Package management using RPM, YUM and UP2DATE in Red HatLinux.
• Configured and maintained Jenkins to implement the CI process and integrated the tool with Ant and Maven to schedule the builds.

TECHNICAL SKILLS

Hardware: Intel Based Servers/PCs, Dell/ HP servers and PCS. Sun Ultra 5/10/60, Sun Enterprise (E250/450, 5000, 6500), Sun A1000/D1000/3310FC Array, Netra T1, Sun Fire (280R, 420R, V210, V240, V250, V440, V480, V490, V880, V890), Linux Server, DellPowerEdge 6300/500, Backup devices, Ethernet Hubs, Routers, LAN Testers, Cable Modems, Terminal Servers and Print Servers

Operating Systems: Linux (Red Hat 4.x, 5.x, 6.x, 7.x, 8, SUSE 9,10,11, Unix-Sun Solaris 8,9,10,11 VMware ESX 3.5,4.0,5.x, 6.x,7.0 Ubuntu.

Programming Languages: C, C++, Unix Shell scripting (ksh, Bash and csh), Python, Perl and Ruby scripting, HTML, PL/SQL

Networking Environment: NFS, AutoFS, NIS, DNS, DHCP, Cisco Routers/Switches, WAN, SMTP, LAN, FTP/TFTP

Cloud Computing: AWS, VMware, Microsoft Azure.

Disk Management: Logical Volume Manager, Veritas Volume Manager, Solaris Volume Manager

File Systems: ZFS, UFS, VxFS, Ext, Ext2, ext3, ext4

Monitoring Tools: Nagios, Tivoli, snmp, EM7, splunk, Xymon, Zabbix

Web/Application Servers: Amazon Web servers (AWS), JBoss, Web Logic, WebSphere, Apache Server, Apache Tomcat

PROFESSIONAL EXPERIENCE

Confidential, Southlake, Texas

Sr. Linux Systems Engineer

Responsibilities:

• Patched 3500+ Linux servers with 100% efficiency to remove vulnerability using automation with Ansible tower with change control process.
• Troubleshoot kernel panic, duplicate packages conflicts and subscription management issues.
• Added resources CPU, RAM, HARDISK to virtual machines, took snapshots, clones, enable/ disable NIC cards.
• Designed and wrote scripts in Shell, Bash scripting, Installations and Configurations of different versions and Editions of Linux servers.
• Troubleshooting the performance, Network issues and monitors the RHEL Linux Servers on Day-to-Day basis.
• Experience in working on LVM's which includes add/expand/configure disks, disk partitioning with FDISK/PARTED.
• Experience in NFS sharing files/directories, with security considerations
• Performed installations, updates of system packages using RPM, YUM.
• Performed Patching activity of RHEL servers using Red Hat Satellite server.
• Installation and configuration of Veritas Volume Manager (VXVM), Veritas file system (VFS).
• Performed configuration and troubleshooting of services like NFS, NIS, NIS+, DHCP, FTP, LDAP, Web servers, Samba server, Apache server.
• Built high-end servers, creating and loading images onLinuxservers.
• Patch and Package administration for installation of patches as per company policy and installation of packaged application.
• Installed, configured and maintained Redhat Cluster Suite (RHCS), Veritas Cluster Server (VCS) and HP Service Guard in multimode active/active and active/passive configuration. Added and maintained service group/packages. Added/removed node to/from existing cluster set.Monitored, Installed packages, patches and secured the server using Red hat satellite server.
• Building VM’s and new Templates for new Projects and allocating them to appropriate Resource pools.
• Involved in operational support of Active Directory, WINS, DNS, and AD enabled applications.
• Experience in configuring and setting up HP ILO for physical HP servers..
• Create Snapshot and test Rollback, configure VMotion, Cluster and Failover.
• Participated in development and maintenance of Disaster Recovery & Backup.
• Resource Management- ConfiguringVMwareHA,VMwareDRS Clusters for VMotion- migrations between ESX Servers.
• Updated the Patches for ESX Servers usingVMwareUpdate Manager in Virtual Center.
• Performed package and patching management and debugging in all flavors of Unix&Linux.
• Troubleshooting and analysis of hardware and failures for various Unix/ (Core dump and log file analysis).
• Implementation of RAID techniques and creation disk groups and volumes, using Veritas Volume Manager. Managing disks and file system using Veritas Volume Manager (VxVM).
• Responsible for the design, build, configuration and troubleshooting of Red Hat Linux 4/5 systems.
• Installed, configured and managed Oracle Real Application Cluster (RAC) in Linux, Solaris and HP-UX servers.
• Setup and Configuration of Puppet, Chef Configuration Management.
• Expertise in Global File System (GFS), Creating, configuring and managing clusters in RedhatLinuxServers using GFS.
• Worked with security patches on production servers.
• RPM package administration using RPM Build.
• Worked with automation using ansible on production servers.
• Migration and P2V conversion Experience on many applications like SQL Server, Exchange running on Windows and some applications running on Linux Redhat and SUSE and VMkernel Linux appliances.
• Experience on Host Profiles, Distributed Switch, DRS, VMotion, SV-Motion, Resource pools, permissions, Patches, Snapshots, Tools Upgrade, disk expansions, Templates, and many more.
• Built and Deployed web application server in an Agile continuous integration environment and automated the whole process.Management of RPM/YUM packages on Red Hat Linux systems.
• Created continuous integration system using SVN, Ant, Jenkins, Puppet full automation
• Analyze, troubleshooting, and resolve RedHat Linux and Server HW, Network problems in a Production Server environment.
• Experience working in VMware ESX (VSphere) 4.x, 5.x hypervisor for virtualization and installed different OS such as Solaris, Linux (RHEL), Windows.
• Building new Virtual Machines in VMware vSphere Client, Citrix Xen.
• Configured and managed Red hat satellite Network server, performing package management tasks and errata updates.
• Administrated server consolidation program through use of VMware ESX server and VMware Virtual Center, using Virtual Center, ESX, creating VMs, using/building VM templates and customization files, and scheduling tasks.
• Installed VMware ESX server 4.0/5.1/5.5 and created virtual machines on ESX Servers.
• Configuring HA/DRS related advanced configuration settings per VMware Best practices
• Configuring VMFS based storage in virtual center.
• Installation and Configuration vCenter Heartbeat for vCenter failover and Failback Purpose.
• Huge P2V Experience usingVMwareconverter running different applications with Different Hardware.

Confidential, Norfolk, Virginia

Sr. System Administrator (Linux/Unix)

Responsibilities:

• Installation and configuration of Red Hat Enterprise Linux servers using kickstart unattended installation in addition to PXE Boot, configuring of new servers and workstations using kickstart and autostart.
• Developed shell scripts for collection and summarize server information for server monitoring and other housekeeping tasks such as file transfers.Deployment of applications on Linux / UNIX environments
• On boarded and migrated test and staging use cases for application to AWS cloud with public and private IP ranges to increase development productivity by reducing test-run times.Implemented CI/CD pipeline using Jenkins, Ansible Playbooks and Ansible Tower
• Expansion of existing file systems on remote servers using NFS Server & client configurations, performed disk configurations and crash recovery.Installed and configured Jenkins for Automating Deployments and providing a complete automation solution.
• Established network security using Linux Firewall and troubleshoot problems relating to boot loaders (GRUB, LILO
• Responsible for Administering Nexus server which includes install, upgrade, maintenance of repositories, performance tuning, troubleshooting issues and maintenance.
• DesignedAzureARM Cloud Formation templates to create custom sized VPC, subnets and NAT. Ability to create scripts using Azure PowerShell during for automation and build process.
• Supported AWS Cloud EC2 instances and used AWS command line Interface to manage and configure various AWS services.
• Installations, configuration and administration of guest OS for different applications on servers,Linuxand Solaris.
• Implemented a Continuous Delivery pipeline with Docker, Jenkins and GitHub and AWS AMI's.
• Implemented Jenkins as Continuous Integration tool to automate build and deployment process.
• Experienced in configuring Red hat Open Shift for operations on AWS public cloud and managing the clusters accordingly.
• Setup Nagios Core (an infrastructure monitoring system) on CentOS 7used SNMP to implement Nagios service checkssimple printer maintenance.
• Used Ansible Tower, which provides an easy-to-use dashboard and role-based access control, so that it is easier to allow individual teams access to use Ansible for their deployments.
• Worked on creating inventory, job templates and scheduling jobs using Ansible tower and writing Python modules for Ansible customization.
• Supported Oracle RAC (Real Application Cluster) Servers running on Linux with GFS and Solaris with SFRAC.
• Create automated Jumpstart environment for Solaris standard builds for WEB, APP and DB servers.
• Extensive experience working on Solaris Volume Manager, creating Metadevices, Soft partitions, Mirroring the devices and Metasets. Space allocation to the Metadevices, detaching and clearing the devices if not in use.
• Perform daily system monitoring, verifying the integrity and availability of all hardware, server resources, systems and key processes, reviewing system and application logs, and verifying completion of scheduled jobs such as backups.
• Utilized SolarWinds for monitoring alerts for CPU, Mem, Network, Disk and various log files including (syslogs, kernel logs and SNMP alerts)
• Patching the servers and updating packages through Redhat satellite.
• Integrated Build Process through Jenkins to various SCM tools like GitHub.
• Implemented SCM tools i.e. GIT, Stash Repositories, Source tree, views, and the access control strategies.
• Deploy and monitor scalable infrastructure on Amazon web services (AWS) & configuration management usingAnsible.
• Integrated delivery (CI and CD process) using Jenkins and Puppet.
• Installation, Configuration and Administration of Red Hat Linux, SUSE Linux servers.
• Performed Kickstart Installations of the Red Hat Linux servers.
• Installing Red Hat Linux using kickstart and applying security polices for hardening the server based on the company policies.
• Installed/configured Jenkins on Linux and Windows servers, various plugins installation, configuration of pipelines, setting up manual gates, security, SSH keys and configuring slaves.
• Responsible for maintaining current software and hardware patch updates for all servers.
• Monitor Hardware console for any hardware issues using NAGIOS.
• Tuning of the Linux OS to increase performance as well as installation of new patches as needed, developed shell scripts to automate daily housekeeping tasks such as file transfers.
• Troubleshooting all problems with performance, upgrades and file transfers.Responsible for Applying patches on all servers using centralized Puppet master server.
• Created Puppet manifests, profiles and roles module to automate system operations.
• Developed/managed Puppet manifest for automated deployment to various servers.
• Experience with integration of Jira with third-party systems such as Service Now.
• Created and configured new JIRA projects and worked with departments to maintain existing JIRA projects.
• Responsible for documenting and maintaining complete and accurate information for all active and decommissioned servers.
• Administrated JIRA, and Maintained documentation using Confluence.
• Worked on storage lifecycle policies to back the data from AWS S3 to AWS Glacier.
• Planned, Scheduled, and Implemented Kernal Patches on Red Hat Linux using Red Hat Satellite Server.
• Managed different infrastructure resources, like physical machines, VMs and even Docker containers.
• Configuring the Docker containers and creating Docker files for various applications.
• Automated the weekly deployments utilizing CI tool Jenkins.
• Virtualized the servers using the Docker for the test environments and dev-environment needs.
• Configuration Automation using Puppet and Docker Containers.
• Updated Maven scripts to use Artifactory repo instead of local repositories.
• Document RIS/WDS, Linux Kickstart, and Unix Jumpstart procedures for team wiki.

Unix/Linux/VMwareAdministrator

Responsibilities:

• Installation, Configuration and Upgrade of RHEL 5.x,6.x OS.
• Daily Administration of RHEL 5.x and 6.x.
• Create and maintaining user, groups accounts on Linux Servers. Implemented and administered VMware ESX 4.x for running the Red Hat Linux Servers on development and test servers.
• Installed software packages and configured File systems as per specifications of client.
• Involved in configuration and support of production environment hosted in a 24x7 setup.Troubleshooting application issues on Apache web servers and database servers running on RedHat Linux.
• Monitored the servers and Linux scripts regularly and performed troubleshooting steps.
• Package management using RPM, YUM and UP2DATE in Red Hat Linux.
• Expertise in Linux backup/restore with tar, gunzip, including disk partitioning and formatting.
• Maintain necessary backup of the important files and documented Linux scripts for future reference.
• Involved in installing infrastructure and maintaining the performance of server, availability. Storage system software and functionality and interface components.
• Installation and configuration of MySQL on RedHat Linux cluster nodes
• Extensive use of UNIX shells like Korn shell, Bash shell for scripting.
• Expertise in RedHat Linux backup/restore with tar including disk partitioning and formatting.
• Involved in Planning, building and Administration of various High Availability clusters and heartbeat checking on Sun Solaris using Veritas Cluster sever in heterogeneous SAN environment.Worked on DNS. Was involved in the configuring Master and Slave Servers for the domain and making Zone files.
• Performed setup, installation and configuration of Solaris with NIS, NIS+, NFS and DNS facilities.
• Server Installations, configurations, upgrades and migrations on HP- UX, Linux.
• Configuring and maintaining virtual server environment using VMWARE ESX vSphere
• Install and configure ftp servers running wu-ftpd 2.6.
• Performed day-to-day LVM operations and System Admin tasks.