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Middleware & Linux System Administrator Resume

Buffalo Grove, IL

SUMMARY

  • 9 years of Strong Experience in Linux / Unix Administration, Middleware Administration (WebSphere, Tomcat, Apache).
  • Expertise in Red - hat Enterprise Linux 4, 5, 6, 7 & 8 and AIX.
  • Expertise in installing, upgrading and configuring WebSphere Application Servers 7.x, 8.x and 9.x.
  • Expertise in installing & administrating Tomcat servers, Apache servers and Java applications on servers.
  • Expertise in installing, upgrading, configuring and administrating Windows 2008, 2012 and 2016 servers.
  • Managed all Linux based systems in low latency and high frequency trading environment.
  • Developed automated processes that run daily to check disk usage and perform cleanup of file systems on UNIX environments using shell scripting and CRON
  • Expertise in creating playbooks in ansible and using ansible to automate & schedule the tasks.
  • Expertise in using BladeLogic tool to perform upgrades in environment.
  • Expertise in creating shell ‘for loop’ scripts to ease and speed up the tasks.
  • Expertise in upgrading Apache, WebSphere and Tomcat servers to latest version.
  • Expertise in renewing SSL certificates in WebSphere environment.
  • Experienced in installing & configuring Linux OS on new servers, migrating system from one platform to another.
  • Experienced in installing, configuring and maintaining Veritas Cluster Systems.
  • Worked and performed data-center operations including rack mounting, cabling (ILO, IDRAC and ILOM).
  • Networking communication skills and protocols such as TCP/IP, NFS, DNS, LDAP, DHCP, NTP and SMTP.
  • Experience in Installing Firmware Upgrades, Kernel Patches, system Configuration, performance tuning on UNIX/ Linux systems.
  • Configuring and Administering NFS, DNS, and LDAP on Sun Solaris Server Environment.
  • Experience in writing shell scripts using ksh and bash to ease administration tasks.
  • Creating Linux Virtual Machines using VMware Virtual Center and Red Hat Enterprise virtualization (RHEV).
  • Good knowledge of IPMP, DMP, SSH configuration, Job Automation.
  • Experienced with the installation, configuration and volume/File system management using Veritas Volume Manager (VxVM) and Logical Volume Manager (LVM).
  • Experience in writing shell scripts to automate the administrative tasks and management using cron.
  • Experience in administering VMware Infrastructure Client and Vsphere, Xen, KVM.
  • Experience in Installing Firmware Upgrades, Kernel Patches, system Configuration, performance tuning on UNIXsystems.
  • Thorough knowledge of UNIX internals and utilities (Kernel, Memory, Swap).
  • On call support on rotation basis for all 24/7 running Servers.
  • Provide technical support to other teams, members and associates.
  • Study existing business process and organizational procedures on regular basis.

PROFESSIONAL EXPERIENCE

Middleware & Linux System Administrator

Confidential, Buffalo Grove, IL

Responsibilities:

  • Responsible for WebSphere systems in the environment, which includes installation, configuration, upgrades and maintenance of all the WebSphere servers in the lower & production environment.
  • Installation & configuration of Red hat enterprise linux (RHEL) in the environment.
  • Building & configuring new Virtual machines using RHEV platform.
  • Responsible for Tomcat & Apache servers in the environment, which includes installation, upgrades and maintenance across all environments.
  • Responsible for Confidential MQ installation & maintenance on servers, which includes configuration and upgrades.
  • Created many useful shell scripts, highlights were; shell script to upgrade Tomcat servers version 8 & 9, shell script to rollback Tomcat servers to previous version, shell script to add cronjob throughout the entire environment to free disk usage by removing old backup files, shell script to upgrade & rollback apache servers.
  • Responsible for applying Interim Fixes for WebSphere servers and RedHat servers to avoid any vulnerability.
  • Responsible for Installation, configuration, updates and maintenance of Oracle Web Logic servers.
  • Migrating the operating systems from Solaris to RHEL platform.
  • Maintenance of RHEL servers, which includes upgrading the OS to latest versions.
  • Ensuring the systems are securely patched in timely manners to avoid any vulnerabilities.
  • Administrating and updating Windows 2012 and 2016 servers.
  • Upgrading the hardware BIOS & firmware versions to keep them up-to-date.
  • Maintaining the DNS and LDAP servers.
  • Supporting and fixing the end user related issues.
  • Hands on experience of working in data center, which includes; racking & cabling the new hardware, swapping bad Hard disk drives, configuring new hardware via crash cart etc.
  • Managing MQ cipher for WebSphere servers.
  • Expertise in renewing SSL certificates for WebSphere environment.
  • Using Ansible automation tool to upgrade the packages in servers and automate tasks.
  • Using BladeLogic to deploy changes to Linux systems.
  • Experience with Apache Kafka.
  • RPM and YUM package installations, patch and other server management.
  • Deploying cronjobs in servers to automate tasks in timely manners.
  • Assisting users with account related issues.
  • Working on Service Now, Sharepoint and confluence to schedule & implement changes.
  • Responsible for scheduling & leading regular meetings to discuss on-going issues and up-coming projects.
  • Supporting on-call rotation wise and creating the on-call schedule for the team.
  • Working closely with the hardware team to decommission any old hardware.
  • Working on uprising issues and any tasks assigned to my team.
  • Working closely with NOC and monitoring systems to notice any alerts and resolve them in timely manners.
  • Working with vendors to resolve any hardware related issues.
  • Documenting all the steps for troubleshooting related issues and sharing with other team members to help others in future.

Linux System Administrator

Confidential, Chicago, IL

Responsibilities:

  • Supporting critical production environment for trading servers.
  • Developed timelines for problems that assist in root cause analysis.
  • Performing automation and configuration via SaltStack management platform.
  • Handled problem resolution; track issues and implementations.
  • Supported all environments (development, test, DR and production).
  • Providing technical support to other teams, members and associates.
  • Configuring ILO, IDRAC, and ILOMs for new builds via crash cart and terminal servers.
  • Installing and configuring RHEL OS on new servers via .iso images, DVD and kickstart servers.
  • Building new RHEL hypervisors and installing new KVMs.
  • Installing, updating, configuring and maintaining Windows 2008, 2012 and 2016 servers.
  • Building new VMs using RHEV and VMware tool.
  • Identified and solved issues in timely manner.
  • Created shell scripts to ease administrative work.
  • Configuration of cisco terminal servers.
  • Installation and configuration of Veritas cluster systems (VCS).
  • Decommissioning the old hosts.
  • Updating and installing packages on servers using rpm and yum.
  • Working with operations team to resolve on-going issues, and/or any issues being reported in monitoring system.
  • Experienced in Troubleshooting critical hardware and software issues and other day-to-day user trouble tickets.
  • Attending meetings on regular basis with vendors and updating team members with ongoing issues.
  • Opening up incident tickets with vendors for any hardware related issues.
  • Managing web interface for IDRAC, ILO & ILOM.
  • Upgrading kernel firmware on servers and BIOS firmware on hardware.
  • Migrating the system from Solaris to RHEL.
  • Upgrading RHEL OS from older version to new version.
  • Troubleshooting space issues in the LVM / file systems.
  • Managing LDAP accounts which includes creating/ resetting/ unlocking/ changing accounts.
  • Creating and implementing changes on production servers.
  • Handling day to day reported issues.
  • Performance monitoring with sar, iostat, vmstat, mpstat and other tools.
  • On-call support on rotation basis.
  • Gathering requirements from customers and business partners and design, implement and provide solutions in building the environment.

UNIX/Linux System Admin

Confidential, Dubuque, IA

Responsibilities:

  • Administration of RHEL and AS 3, 4, 5, 6 which includes installation, testing, tuning, upgrading and loading patches, troubleshooting both physical and virtual server issues.
  • 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.
  • Installation and upgrading packages in Linux/UNIX/ and Solaris Servers.
  • Removing / modifying installed packages on machines.
  • Migrating the system from one server to another.
  • Upgrading of OS level on UNIX servers.
  • Managing accounts such as creating/ resetting/ unlocking/ changing account.
  • Decommissioning /retiring Linux/UNIX servers.
  • Managing crontab on production servers.
  • Creating/ implementing scripts.
  • Creating and managing LVM / File system on Linux /UNIX machines.
  • Troubleshootingthe root causes for issues in servers.
  • RPM and YUM package installations, patch and other server management.
  • Account focal for two major accounts for Confidential, communicating with the customers, meeting and interactions with the program managers on daily basis.
  • Installed and verified that all AIX/Linux patches or updates are applied to the servers.
  • Involved in maintenance support and troubleshooting of system deployed with customers.

UNIX/Linux Administrator

Confidential

Responsibilities:

  • Administration of RHEL and AS 3, 4, 5 which includes installation, testing, tuning, upgrading and loading patches, troubleshooting both physical and virtual server issues.
  • Creating, cloning Linux Virtual Machines, templates using VMware Virtual Client 3.5.
  • System and Network Administration training, which include but is not limited to installing Linux, Solaris, UNIX internals, NFS/NIS management, and DNS Configuration
  • Wrote shell scripts for automated installations, to extract logs.
  • Installed, configured, and maintained Oracle 11g on Solaris & Red hat Linux.
  • Creating, installing and configuring Zones, LDOMs in Sun Solaris 10using Jumpstart.
  • Performs Integration, Deployment and maintenance support of system integration activities.
  • Involvement in application development and Technical Support on Smart Cardsbased projects along with customization, development, administration, validation and upgrades of our software products.
  • Worked with multiple card related tools like Card Admin, POS Bridge, SMSC Toolkit, and MKS Integrity Client.
  • Validating the cards by Activating, Polling the Services to the card based on the requirements of the customer.
  • Provides coordination with technical presentation to the customer. Perform data backups and disaster recovery operations.
  • 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.
  • Involves in maintenance support and troubleshooting of system deployed with customers.
  • Adding SAN using multipath and creating physical volumes, volume groups, logical volumes.
  • Installing and configuring Apache and supporting them on Linux production servers.
  • Troubleshooting Linux network, security related issues, capturing packets using tools such as IPtables, firewall, and TCP wrappers, NMAP.
  • Upgraded Red hat Linux OS on Websphere, JBOSS and Oracle database servers from V3, V4 to V5.
  • Developed automated processes that run daily to check disk usage and perform cleanup of file systems on UNIX environments using shell scripting and CRON.
  • Installing, configuring Veritas Netbackup 6.5 on Solaris, Red hat servers, creating polices, scheduling jobs.
  • Involves in maintenance support and troubleshooting of system deployed with customers.
  • Study existing business process and organizational procedures on regular basis.
  • Provide technical support to other teams, members and associates.
  • Installation, Maintenance, Administration and troubleshooting of OEL, Linux, Sun Solaris, AIX, HP-UX systems.
  • Performed automated installations of Operating System using Jumpstart for Solaris and Kickstart for Linux.
  • Administration of RHEL and AS 3, 4, 5 which includes installation, testing, tuning, upgrading and loading patches, troubleshooting server issues.
  • Creating, cloning Linux Virtual Machines, templates using VMware Virtual Client 3.5 and migrating servers between ESX hosts.
  • RPM and YUM package installations, patch and other server management.
  • Managing systems routine backup, scheduling jobs likedisabling 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.
  • Set up user and group login ID's, printing parameters, network configuration, password, resolving permissions issues, user and group quota.
  • Installing, administering Red hat using Xen, KVMbased hypervisors.
  • Adding SAN using multipath and creating physical volumes, volume groups, logical volumes.
  • Installing and configuring Apache and supporting them on Linux production servers.
  • Preparing servers for Oracle RAC installation, which includes tuning the kernel, agent installation, adding NAS storage.
  • Installed and verified that all AIX/Linux patches or updates are applied to the servers.
  • Designing Firewall rules for new servers to enable communication with application, Oracle 10g servers.
  • Installation and configuration of VxVM 5.0 and creating disk groups, volumes, increasing volumes.
  • Installed, configured, and maintained WebLogic 10.x and Oracle 10g on Solaris & Red hat Linux.
  • Experienced in Troubleshooting critical hardware and software issues and other day-to-day user trouble tickets.
  • Developed automated processes that run daily to check disk usage and perform cleanup of file systems on UNIX environments using shell scripting and cron.

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