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Senior Linux Administrator Resume

Chicago, IL

PROFESSIONAL SUMMARY:

  • Around 7+ years of professional IT experience in Infrastructure Support/operations on Solaris, Linux, and AWS.
  • Experience in Unix/Linux Systems Installation, Configuration, Implementation, and performance Tuning, Maintenance, Security Setup, and Support & Trouble - shooting.
  • Hands on experience in Amazon Web Services (AWS) provisioning and good knowledge of AWS services like EC2, Elastic Load-balancers, S3, IAM.
  • Launching Amazon EC2 Cloud Instances, using Amazon Web Services and Configuring launched instances with respect to specific applications.
  • Working on Multiple AWS instances, set the security groups, Elastic Load Balancer and AMIs, Auto scaling to design cost effective, fault tolerant and highly available systems.
  • Worked in Networking and possess knowledge of TCP/IP Protocols, NIS, NFS, DNS and SMTP (Send mail).
  • Experience in Administering of Linux hosts using VMWare ESxi.
  • Experience in working with Redhat satellite server.
  • Experience in writing playbooks using Ansible.
  • Strong analytical skills to solve complex and technical issues.
  • Good Knowledge and Administering Virtualization technologies LDOMS, Zones.
  • Everyday UNIX and Linux Server administration, deployment, configuration, troubleshooting and server builds.
  • Performing security audits and remediating the Vulnerabilities.
  • Sound understanding of IT Infrastructure Administration with project management skills.
  • Performed health checks for servers inside the Datacenter to ensure functionality.
  • Asset management and inventory for software and hardware.
  • Recorded Incident Reports for all major incidents and ensuring repeated incidents are closed via Problem Management.
  • Experience in providing day-to-day user administration like adding/deleting users and managing users queries.
  • Hands-on experience with different types of storage structures (SAN/NAS/DAS).
  • Experience on Disk Administration using VERITAS Volume Manager, Solaris Volume Manager, RHEL LVM, ZFS.

TECHNICAL SKILLS:

Operating Systems: RHEL 5/6/7, CentOS 5.x/6.x/7, Ubuntu/Debian/Fedora, Windows Server 2003/2008/2012, Sun Solaris 7/8/9/10.

Build/Automation Tools: Puppet, Chef, Ansible, Ant, Maven, Hudson & Bamboo, Jenkins, Mesos & Marathon Cluster Management, Elasticsearch, Kibana

Languages: Python, Shell, Bash, Perl, Ruby scripting

Databases: MySQL, SQL Server, Cassandra, MongoDB PostgreSQL, Web/App Server Apache, Tomcat, IIS, HIS, WebSphere Application Server, JBoss

Bug Tracking Tools: JIRA, Crucible, Rally, Remedy Bugzilla and IBM Clear Quest, HP Quality Center, TDD, ATDD

Version Control Tools: GIT, Tortoise SVN, Visual SVN, Bitbucket

Web Technologies/Programing: Languages Servlets, Python, JSP, JDBC, XML, HTML, Java Script, C, C++, .Net, Ruby, Pearl scripting, Shell scripting.

WORK EXPERIENCE:

Senior Linux Administrator

Confidential, Chicago, IL

Responsibilities:

  • Responsible for all aspects of TCP/IP functionality across multiple Enterprise environments.
  • Used DHCP to automatically assign reusable IP addresses to DHCP clients.
  • Implementation, working analysis, troubleshooting and documentation of LAN, WAN & WLAN architecture with excellent work experience on IP series
  • Working knowledge with Load Balancers F5 LTM like 3900, 6900 for various application
  • Working knowledge of Firewall, LDAP, AAA, TACACS/RADIUS, and IPSEC.
  • F5 load balancers LTMs, GTMs, EMs, ASM, and Firepass in Datacenter and remote functions.
  • Advanced server protocols and utilities (DNS, SMTP, S/FTP, TCP/IP UDP, SSH, Samba)
  • Working with Logical Volume Manager and creating of volume groups/logical and performed Red Hat Linux Kernel Tuning.
  • Experienced in architecting and administering Linux servers, scheduling systems, and high - performance storage and networking systems.
  • Distribution administrative tasks, RPM and YUM repository.
  • Expertise in configuring Red Hat Cluster Nodes for any legacy applications and verified the daily health check on the Cluster Nodes utilizing clusters.
  • Expertise in creating VM Templates, cloning and managing Snapshots.
  • Experience in BEA WebLogic Application server 7.x/8.x/9.x/10.x administration under heterogeneous environments like UNIX, RHEL, SUN Solaris 8.0, 9.0, 10.0, IBM AIX and Windows NT.
  • Managing location specific Cisco ASA Firewalls and also data center internet gateway firewalls.
  • Supporting and troubleshooting network services and protocols such as TCP/IP, DNS, NFS, FTP, SSH, Kerberos, End mail, and LDAP.
  • Use Jump start for OS installation with support of Jump Start server.
  • Configure local file system according to service requirements.
  • Configured HSRP and VLAN trunking 802.1Q, VLAN Routing on Nexus 9k, 7k, 5k, and Catalyst 6500 switches.
  • Working with VERITAS Volume Manager for creating volumes and file systems for various applications and databases.
  • Hands on experience in building 10 node cluster for Linux /Unix.
  • Hands on experience in building Veritas Cluster Server
  • Configuring various advanced features (Profiles, monitors, iRules, Redundancy, SSL Termination, Persistence, SNATs, HA on F5 BIGIP appliances SSL termination and initiation, Persistence, Digital Certificates, executed various migration/upgrade projects across F5 and hands on withF5 BIGIP LTMs/EM.
  • Configured F5 Load balancers and monitored the Packet Flow in the Load balancers.
  • Expertise in troubleshooting and configuring DNS, DHCP, TFTP,TELNET,SSH, FTP and NFS

Linux Admin

Confidential, Evansville, IN

Responsibilities:

  • Installing operating systems Linux, CentOS and Solaris according to business requirements.
  • Troubleshooting the issues ranging from Solaris, Linux and SAN environments.
  • Created and Maintained Solaris 10 zones/containers.
  • Experience in creation and maintenance of ZFS file systems.
  • Regularly applying patches both for Linux / CentOS systems.
  • Installed and Configured Kickstart Server.
  • Working with VERITAS Volume Manager for creating volumes and file systems for various applications and databases.
  • Creating and maintenance of Virtual machines in VMware workstation and ESX.
  • Worked on different VMware products like VMware workstation, VMWare server 1.2 /2.0 GSX/VMware server, VMware player, VMware Converter and ESX server 3.X.
  • Configured, Installed LDAP authentication in Linux server environment.
  • Managed Opsware for network device management and monitoring.
  • Involved in SAN migration project to migrate the data across the storage arrays.
  • Consolidated physical servers migrating into VM Virtual environment.
  • Part of service transition team, during Convergys sold its HR business.
  • Implemented security policy and managed firewalls/IDS. Managed DNS, send mail, IP space.
  • Responsible to handle AD accounts, SCCM single image creation and deployment.
  • Providing 24/7 on - call support on rotation basis.
  • Developed Bash and Perl scripts to automate routine activities
  • Installation and Configuration of Windows Active directory server 2008 and citric servers. Administration of applications via Citrix Metaframe.

Linux Systems Admin

Confidential, Northbrook, IL

Responsibilities:

  • Experience with UNIX / LINUX - red Hat Enterprise Linux 5,6,7 systems including building of servers, migration, production support, data center support, packaging, automation, troubleshooting and security hardening of servers.
  • Experience with managing and integrating with virtualization solutions (VMware, LDOMs, Zones)
  • Experienced in configuring and administering NFS, NIS and FTP with very good understanding of networking protocols such as TCP/IP, DNS.
  • Experienced with SAN, NAS and storage administration, with EMC Clarion & DMX storage. Configured Sun Multi-Packs, Storage Arrays, T3's and SAN backup for disaster recovery.
  • Expert in Linux Performance monitoring, kernel tuning, Load balancing, health checks and maintaining compliance with specifications.
  • Build & Release management, shell, python, bash scripting.
  • Software configuration management (SCM) and change management (CM) solution using TFS, Rational Clear Case, Jira, Clear Quest (Change Control tool).
  • Running security scans and remediating Servers to meet enterprise standards.
  • Implemented anti-spam technology based on open source applications on Linux servers.
  • Installing, configuring, and maintaining Samba Web Servers, WebLogic and WebSphere Application Servers, and Oracle, SQL and Sybase database technologies.
  • Moving RHAS machines from physical to virtual including VMware ESX 3.5 and vSphere 4.0.
  • Installing and upgrading VMware tools on client machines.
  • Experience in configuring and maintaining NAS and SAN storage.
  • Managed Patches, Upgrades and Licensed Products for System software on all flavors of UNIX and Linux Servers.
  • Supported Disk Volume Management - creating volume and Logical Volume Manager.
  • 24X7 on-call production support and troubleshooting problems related to RHEL and SUSE Linux.
  • Experience in Troubleshooting issues related to upgrades of VCenter and ESxi and vSphere update manager.

Linux Systems Admin

Confidential, Denver, CO

Responsibilities:

  • Installation, configuration and upgrade of RHEL 4/5/6/7, Ubuntu, Oracle Enterprise Linux5/6/7 operating systems.
  • Automated installation of Linux servers using Kickstart and Installation of Solaris using Flash, live upgrades and Jumpstart Servers.
  • Involved partially in deploying WARs/EARs (backend) through JBoss Application Server console.
  • Worked for Creating the Software Configuration Management Plan. Worked on Administration, maintenance and support of Red Hat Enterprise Linux (RHEL) servers.
  • Responsible for defining the branching and the merging strategies, created baselines and released the code. Designed and implemented Configuration Management processes and procedures
  • Used Ant, Maven and Gradle as a build tools on Java projects for the development of build artifacts on the source code. Maintained and administered GIT source code tool.
  • Backed up and restored configurations and data of various tools (Subversion (SVN), Jenkins, WAS), databases (oracle, db2) and servers (windows, RHEL) as required.
  • Maintained activities related to security in TFS
  • Extensively worked on Jenkins/Ansible/Bamboo/Docker. By installing, configuring and maintaining for the purpose of continuous integration (CI) and for End to End automation for all build and deployments.
  • Automated the build and release management process including monitoring changes between releases.
  • Implementing a Continuous Delivery (CD) framework using Jenkins, Puppet, Maven& Nexus in Linux environment.
  • Written Chef Recipes to automate our build/deployment process and do an overall process improvement to any manual processes.
  • Setting up Ant and Maven scripts for JAVA and J2EE Builds Imported and managed multiple corporate applications in Subversion (SVN).
  • Changed the AWS infrastructure Elastic Beanstalk to Docker with Kubernetes.
  • Built Python apps that allowed developers to build proprietary solutions without requiring standard components.

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