Linux System Administrator

Linux System Administrator

Key Responsibilities

• Administer and monitor Linux systems, OpenShift container platform, and other IT infrastructure.
  • Install, configure, and maintain Linux operating systems, middleware, application software, and system management tools.
  • Develop and maintain Ansible playbooks, including inventory management, roles, and group configurations.
  • Proactively ensure maximum system uptime, reliability, and availability.
  • Monitor system and application performance, identify bottlenecks, and collaborate with development teams to implement fixes.
  • Maintain and enforce security standards, access controls, backup routines, and disaster recovery strategies.
  • Automate routine or complex tasks to improve efficiency and reduce manual intervention.
  • Coordinate with vendors and IT staff to troubleshoot and resolve infrastructure issues.
  • Respond to and resolve day-to-day tickets and service requests from development and other IT teams.
  • Support deployments, configurations, and patching activities as needed.
  • Document troubleshooting steps, solutions, and known issues to support knowledge sharing.
  • Participate in after-hours support as needed.

Minimum Qualifications
• 8+ years of hands-on experience in LINUX administration.
• 2+ years working with and administering OpenShift platforms.
• A bachelor's degree in Computer Science, Information Technology, or a related field.
• Extensive experience installing, configuring and managing Linux servers including SLES, RHEL, and other distributions.
• Experience in OpenShift administration (use of OpenShift CLI), including understanding of architecture, containerization, and GitOps using ArgoCD.
• Ability to create and maintain CI/CD pipelines in OpenShift, streamlining maintenance and deployment processes.
• Proven working experience in troubleshooting Linux based environments (analyze system logs, dumps, and other diagnostic information).
• In depth understanding of and experience with Ansible.
• Experience with other automation tools and scripting languages (Bash, PowerShell, Python) to manage large numbers of servers.
• Experience configuring and administering webservers (Apache NGINX, etc.).
• Experience with monitoring systems (Nagios, Icinga, etc.).
• Deep understanding of virtualization concepts and technologies, including knowledge of virtual machine (VM) management, virtual networking, storage virtualization, and resource pooling.
• Understanding of network protocols and configurations (TCP, UDP, etc.).
• Some data center experience or the willingness to learn.
• Self-driven learner that embraces automation and new technologies as they mature.


Preferred Qualifications
• 12+ years of hands-on experience in LINUX administration.
• 4+ years working with and administering OpenShift platforms.
• 2+ years in data center operations.
• A master's degree in Computer Science, Information Technology, or a related field.
• Knowledge of how to manage container images, including building, pushing, and pulling images.
• Experience in the administration of Java J2EE application stacks (WebSphere, Tomcat, Open Liberty, etc.).
• In depth knowledge of Linux file systems (nfs, ext3, ceph, etc.).
• SUSE Linux enterprise server experience on IBM mainframe.
• Experience with SUSE Manager.
• knowledgeable of OpenShift Virtualization.
• Familiar with IBM Storage Protect (Tivoli Storage Manager/TSM).
• Expertise in installing, configuring, and maintaining z/VM and z/VSE operating system.
• Expertise in mainframe storage management (DASD, virtual tape, physical tape).