SUMMARY

• Over 8 years of experience in System Administration working on Red Hat Enterprise Linux(RHEL), Cent OS, Ubuntu, Sun Solaris, SUSE and windows environment.
• Strong experience working with various Development & Test teams in a dynamic organization environment.
• Experience in Installation, configuration, Administration and Supporting of RHEL 4, 5.x, 6.x SUSE Linux Enterprise Server (SLES) 11.x, 10.x, 11i Solaris 8, 9, 10, 11, Windows Server NT, 2002, 2003, 2007, 2008, 2010.
• Experience with DevOps tools Chef, Puppet, Openstack, Docker, AWS EC2, S3 Storage, Jenkins Atlassian JIRA, Confluence and Git.
• Extensive experience and highly proficient in writing build scripts inApache Ant, Apache MavenandGradleto write and build.xml, pom.xml and BUILD GRADLE respectively.
• Experienced installing, upgrading and configuring Red Hat Servers using Kickstart and Solaris Server using Jumpstart and customizing the Kickstart profiles and Jumpstart scripts to automate the installation of various servers.
• Experience with Linux systems administration, Kernel Tuning, Application Tuning and Standard Administration, Shell scripting using sh, ksh, bash and python.
• Developed custom saltstack formulas for a variety of standard management tools within the high trust network.
• Solid knowledge of Linux kernel internals, some experience building customized kernels.
• Familiar with Red Hat Network (RHN) and Red Hat
• Network Satellite for operating system upgrade or maintenance.
• Experience in implementing technologies such as: Apache, Tomcat, JBoss, Web Sphere including reverse proxy and modules.
• Experience in deploying applications in WAR, EAR and JAR formats on WebSphere Servers and Clusters.
• Stood up Cassandra clusters in the Amazon Web Services Cloud and migrated data between environments.
• Experience in installing and configuring the mail servers like Sendmail 8.13, 8.14.x and Postfix 1.x, and 2.x.
• Comfortable performing system upgrades, installing layered products, and analyzing and troubleshooting complex production systems.
• Experience in administering VMware ESX, ESXi 3.x, 4.x, and 5.x.
• Experience in Confidential (7 - mode and c-mode)and ONTAP 7.x,8.x., EMC storage
• Experience with configuring firewalls using Linux. Familiar with configuring advanced features such as NAT, port redirection, and logging.
• Familiar with Installation, configuration of Packages, Security Fixes and Patches using Red Hat Satellite Server.
• Knowledge of networking concepts (DNS, TCP/IP, HTTP, SSH, OSI layers, Client/Server architecture and Firewalls).
• Proficient working with TCP/IP, DNS, DHCP, NFSversion 2/3/4), NIS, NIS+, SAMBA, LDAP, SSH, SSL, SFTP, SMTP, SNMP, SAN, NAS.
• Strong knowledge of system performance and monitoring tools such as CA Unicenter, SAR, dstat, iostat, vmstat.
• Experience NIC bonding/NIC Teaming configuration in Linux/UNIX/Windows/VMware systems to increase the bandwidth or redundancy based on requirement by the application.
• Day to day administration of the Development environment and Production and Test environment systems, 24x7 on-call support.

TECHNICAL SKILLS

Operating Systems: Windows, Linux, UNIX, Windows,NT, Windows 2000, Windows server 2008,Windows server 2012, MS-DOS, RHEL 5.x/6.x/7, CentOS 5.x/6.x/7, Ubuntu/Debian/Fedora, Sun Solaris 7/8/9/10, Windows Server 2003/2008/2012.

Languages: C, C++, and JAVA, ASP, .NETs

Web Server: IBM HTTP Server, Apache HTTP Server, Microsoft IIS,TomCat

Networking: DNS, DHCP, TCP/IP, SMTP

Protocols: HTTP, HTTPS, LAN, WAN, IPv4/v6, TCP/IP, UDP& Telnet.

Build and Automation Tools: Puppet, Chef, Ant, Maven, Docker, Jenkins Urban deploy, Ansible, GIT, GITHUB.

Scripting tools: Bash, Perl, Python, Ruby, Shell, PowerShell

Database: MySQL, Cassandra, SQL Server

IDE: Eclipse, Net Beans.

System: Testing Apache Jmeter

Team Collaboration: Confluence

Virtual Tools: AWS, Microsoft Azure

Release/Project Management: Microsoft Release management Server

Issue Tracking: Bugzilla, JIRA

PROFESSIONAL EXPERIENCE

Confidential, VA

Infrastructure DevOps Engineer / Systems Engineer

Responsibilities:

• Installation, configuration and Operating System upgrade on, Red Hat Linux 5.x, 6.x, 7.0Ubuntu 13.x, 14.x and Windows 2008 R2, 2012.
• Built Openstack environment for developers allowing self-provisioning.
• Created custom Openstack Glance images for developers.
• Provision AWS instances in AWS EC2 cloud in different VDCs.
• Configured auto scaling in AWS for various application environments.
• Help dev teams identifying possible containerized applications in the AWS environment.
• Create puppet modules for various application installation and configuration management.
• Work with DEV teams to support their POC activities and roll over configurations to DEV, TEST and Staging environments.
• Evaluating Docker container technology to replace some virtual environments.
• Developing Docker Images to support Development and Testing Teams and and their pipelines.
• Work with DEV and Test teams to develop puppet modules for auto deployment integrate with Jenkins to support CI/CD model.
• Evolving new tools/methodologies to improve this existing process and show better results to all stakeholders
• Created Jenkins jobs to listen for changes in SVN and GIT and execute the sequence of targets including compile, junit, create jar and war file.
• Support the code builds by integrating with continuous integration tool (Jenkins)
• Written Maven scripts, Installed Jenkins, written shell script for end to end build and deployment automation.
• Involved in migration of Artifactory&Git server
• Provided configuration management expertise to all software development projects.
• Release Engineer for a team that involved different development teams and multiple simultaneous software releases.
• Knowledge of Cassandra maintenance and tuning - both database and server
• Install, configure, update, and troubleshoot web servers like Apache, Tomcat.
• Responsible for the proper functioning of the systems and all supported applications.
• Reviewing of system and application logs, and verifying completion of scheduled jobs such as backups.
• Setup Chef Server, workstation, client and wrote scripts to deploy applications.
• Used cookbooks, recipes, roles, Databags, runlist to deploy web applications, applications servers and vendor applications.
• Used Test Kitchen to test the scripts and used Ohai to collect attributes on node.
• Maintained Chef Servers and management application that can use Service Now (CI) data to bring computers into a desired state by managing files, services, or packages installed on physical or virtual machines.
• Configured Jira, Confluence, BitBucket, Bamboo, Chef, Jenkins, Docker, Vagrant, SourceTree, Packer and Data Migration from on-prim to AWS, BOTO, Tomcat, and Nginx, automation using Bash Scripting, AWS CLI and Python.
• Able to create complex JIRA workflows including project workflows, screen schemes, permission scheme and notification schemes in JIRA.
• Install and configure various services like DHCP, NFS, DNS,Apache Web Server, NIS, LDAP, Samba, JBoss, Web Sphere, SSH, FTP/SFTP, Sendmail/SMTP, Telnet, Web logic, RPM Package Management, File System Management.
• Modifying user’s password policies, group policy, UID and GID assignment policies.
• Install, configure, update, and troubleshoot database servers like MSSQL Cluster, MySQL, Oracle9i/10g/11g, Mongo DB 2.x and 3.0.

Environment: DevOps, AWS, Openstack, Docker, Jenkins, GIT, Red Hat Linux 5.x,6.x, 7.0, Ubuntu 13.x,14.x, Windows 2008,2010,VMware ESX 3.5,HP Blade servers, HP Proliant BL460c, DL560 DELL Poweredge 1850, 2850, 6450 Sun StorEdge A1000, A5000,JIRA, Apache 2.2/2.4,Tomcat 6.x/7.x,Sendmail, Postfix, Confidential, ONTAP,TCP/IP, NFS, RAID, Web logic 8.1, Samba, JBoss 6.x/7.x, Oracle 9i/10g/11g, YUM, RPM.

Confidential, MD

Devops Engineer

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 4.1, ESXi5.1, ESXi 5.5servers.
• Performed Installation, configuration of RHEL 5 and Solaris.
• Actively Involved in Building and configuring of red hat Linux and Solaris 9/10 servers remotely using Jump Start /Kick Start Servers.
• Installation, configuration and management of SAMP (Solaris/Apache/MySQL/PHP) and LAMP (Linux/Apache/MySQL/PHP) stacks.
• Creating templates, cloning Linux Virtual Machines and migrating servers between ESX hosts.
• Setup and management of SFTP server for file transfer services.
• Implemented chroot jailing for users to have restricted access to the SFTP server.
• Provided support for JBoss 5.x and apache 2.0 application for operation related to installation and configuration.
• Used ANT and MAVEN as a build tools on java projects for the development of build artifacts on the source code.
• Maintained and administered GIT source code tool.
• Created Branches, Labels and performed Merges in Stash and GIT.
• Drafted shell scripts for automated installations.
• Developing Scripts for build, deployment maintenance and related tasks using Jenkins, Docker, Maven and Bash.
• Worked on Docker container Deployments and provided support.
• Created a pipeline for CICD using Jira, BitBucket, Bamboo & Confluence
• Configured Confluence & Jira for Project Management as well as Software delivery
• Work with storage team and application team to ensure the storage allocation and design is done at initial construction time.
• Worked with Database administrators to tune kernel for Oracle installations on Linux.
• Monitored the systems CPU, memory, IDE/SCSI disks, disk controllers, RAID, RAID controllers, file systems, and network parameters using the tools NAGIOS system-monitoring tool and BMC performance management tools.
• Integration of more than 500 Linux servers to authenticate using Windows Active Directory using Winbind and Samba.
• Managing DNS for external and internal domain &Sendmail Relay Server for outgoing mails.
• Creating Zones, containers, LDOMs on Solaris servers, creating zpools, ZFS file system.
• Preparing servers for Oracle RAC installation which includes tuning the kernel, agent installation, adding NAS storage on 2, 3, 4 node clusters.
• Designing Firewall rules for new servers to enable communication with application, Oracle 10g servers.
• Setting up network environments using TCP/IP, NIS, NFS, DNS, SNMP agents, DHCP and Proxy.
• Worked with engineering team to resolve tickets related to engineering issues like firewall change requests.
• Install/troubleshoot AUTOSYS to schedule application jobs.
• Generated detailed documents and reports on issues and solutions for future reference.

Environment: RHEL 4.5/5.x/6.x, Solaris 8 /9,Windows 2007/2008/2010 , Veritas Net backup, IBM X Servers X3400, X3550, X3650, X3650M2, TCP/IP, NIS, NFS, DNS, SNMP, DHCP, Apache 2.0, NAS, Oracle 10g, Oracle RAC, Samba, Winbind, JBoss 5.x.

Confidential

DevOps Consultant/Linux System Administrator

Responsibilities:

• Installation of Red Hat Enterprise Linux 4.x, 5.x using Kickstart and PXE on HP Blade Servers.
• Installing, Configuring and Upgrading of the Cent OS 5.x.
• Performed support role for applications on mission critical Enterprise Networks and Multi-server environments.
• Troubleshooting various issues on Ssh, ftp, telnet etc.
• Implementations of automatic secure SSH Login, User and Group administration.
• Work with DEV teams to support their POC activities and roll over configurations to DEV, TEST and Staging environments.
• Created Jenkins jobs to listen for changes in SVN and GIT and execute the sequence of targets including compile, junit, create jar and war file.
• Provided configuration management expertise to all software development projects.
• Virtualized Linux servers and deployed automated tasks using BMC Blade Logic Server Automation Suite and Samba & NFS file Server for sharing files on multiple clients.
• Patch and package administration for installation of patches as per the company policy and installation of packaged application.
• Configured iptables on Linux servers.
• Developed custom saltstack formulas for a variety of standard management tools within the high trust network.
• Implemented Spacewalk Open Source (Red Hat Satellite Server) System management application for auto provisioning, software grouping, custom package channel, system inventory, auto deploying patches and monitoring of Red Hat Servers.
• Swap space administration, Data Warehousing and System Backup using tar, cpio for local systems.
• Responsible for developing and planning the implementation of technical downtime and recovery processes and the technical setup of downtime systems.
• Worked on POSTFIX mail server running on Red Hat Linux.
• Remote system administration using tools like SSH, Telnet, and Rlogin.
• Implemented open source base monitoring tool Nagios 3.0 for servers, SAN switches, EMC SAN Storage and VMware ESX and ESXi.
• 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 settings for various users.
• Ensuring data redundancy with RAID implementation.
• Shell and Perl scripts to automate daily repetitive activities.
• Build Apache2 web server in Solaris and Apache in Red Hat, FTP and NFS.
• Open ports for applications and process that require special ports.
• User, Group management for all the UNIX servers.

Environment: Red Hat Enterprise Linux 3.x/4.x/5.x, Cent OS 5, Fedora core 2, Apache2.0, Postfix, BMC Patrol, RAID, HP DL, C7000, PE Dell R410,R610, VMware ESXServer2.x, RAID, FTP, NFS.

Confidential

Jr Linux System Administrator

Responsibilities:

• Installation, configuration and administration of Red Hat Linux servers and support for Servers.
• Provided 24x7 System Administration support for 300+ Red Hat Linux 3.x, 4.xservers and resolved trouble tickets on shift rotation basis.
• Configuration of Hardware and Software RAID on Digital & Sun Servers.
• Kernel tuning, Writing Shell scripts for system maintenance and file management.
• Used lilo and fsck to resolved server issues using rescue mode, and single user mode.
• Shell scripting for database startups, backups using bash shell scripting.
• Monitoring system resources, logs, disk usage, scheduling backups and restore.
• Setup Clustering for Linux servers.
• Installation and configuration of Oracle 7.x/8.x.
• Creating templates, cloning Linux virtual Machines and migrating servers across ESX hosts.
• Managing HP-UX, Compaq and Linux workstations and servers.
• Configured and Administering NFS and NIS on Sun Solaris server environment.
• Responsible for preparing architectural flow diagrams and presentations.
• Day to day ticket resolving & submit CRQ based on user requirement.
• Set up Quotas for the user accounts & limiting the disk space usage.
• Responsible for scheduling jobs using crontab and at.
• Responsible for configuring and managing Squid server in Linux.
• Rpm management
• Using Opsware.
• Install and support user requested rpm’s whenever it is required.
• Perform day to day Linux administration such as user accounts, logon scripts, directory services, file system shares, permissions.
• Troubleshooting Backup and Restore problems Creation of LVMs on SAN using Linux utilities
• Configured Sendmail.
• Creating LDOMs, installing Solaris, creating volumes, installing packages.
• Wrote Technical documentation for various projects and worked with Technical writer to finalize the documents.

Environment: Red Hat Linux 3.x, 4.x,Solaris 8 OS, HP-UX 11, V440, V490, V880, V890, V240R, JBODs Compaq servers and SUN fire 6800K, SENDMAIL, SAN, Veritas Volume Manager 3.4, Veritas Net backup, Squid, Oracle 7.x/8.x