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 HTTP, 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).