Linux and OpenShift Administrator, Senior

BowheadCorona, CA
21hOnsite

About The Position

Bowhead is seeking a Senior Linux and OpenShift Administrator to provide senior-level administration, engineering, and operational support for Linux-based enterprise systems and container platforms, including Red Hat OpenShift, supporting mission-critical government and DoD programs. Serve as a technical authority for Linux infrastructure, container orchestration, automation, and secure system operations in classified and unclassified environments. This position is 100% onsite.

Requirements

  • Bachelor's degree in Computer Science, Information Technology or a related field.
  • Seven plus (7+) years of experience as a System Administrator with a strong focus on Linux systems.
  • Senior-level administration of Linux enterprise environments
  • Hands-on experience with Red Hat OpenShift and Kubernetes
  • Container platform security, RBAC, and compliance implementation
  • Scripting and automation (Ansible, Bash, Python)
  • Virtualization and enterprise infrastructure support
  • Experience supporting mission-critical or classified systems
  • Strong troubleshooting, documentation, and communication skills
  • Ability to work independently and lead technical efforts
  • Comp TIA Sec+
  • Red Hat Certified Engineer (RHCE)
  • Red Hat Certified Architect (RHCA)
  • Must currently hold a security clearance at the minimum Secret level.

Nice To Haves

  • Experience in DoD, classified, or SAP environments
  • DevSecOps and CI/CD pipeline integration experience
  • LPIC-2 & LPIC-3 (Linux Professional Institute)
  • Linux Foundation Certified Engineer (LFCE)
  • Certified Kubernetes Administrator (CKA)
  • GIAC Certified UNIX Security Administrator (GCUX)

Responsibilities

  • Install, configure, administer, and maintain Linux operating systems (RHEL, CentOS, Rocky, or equivalent) across physical, virtual, and containerized platforms.
  • Deploy, configure, administer, and sustain Red Hat OpenShift clusters, including control plane and worker nodes, storage integration, networking, and platform upgrades.
  • Support containerized workloads using Kubernetes and OpenShift, including image lifecycle management, registry integration, role-based access control (RBAC), and namespace management.
  • Perform system hardening, patching, and vulnerability remediation in accordance with DoD STIGs, RMF, and cybersecurity requirements, including container security best practices.
  • Support and maintain virtualized and hyper-converged infrastructure (VMware ESXi) hosting Linux and OpenShift environments.
  • Develop and maintain automation and Infrastructure-as-Code (IaC) solutions using Ansible, Bash, Python, and CI/CD integrations to accelerate platform provisioning and consistency.
  • Monitor system, cluster, and application performance; troubleshoot complex Linux, Kubernetes, and OpenShift-related issues across development, test, and production environments.
  • Implement and maintain logging, monitoring, and alerting solutions for Linux systems and OpenShift clusters.
  • Support backup, recovery, and disaster recovery solutions for Linux systems, container platforms, and persistent storage.
  • Collaborate with cybersecurity, networking, DevSecOps, SOC/NOC, and application teams to ensure secure, resilient, and compliant operations.
  • Develop and maintain technical documentation including build guides, SOPs, platform architecture diagrams, and configuration baselines.
  • Participate in security assessments, audits, inspections, and Authority to Operate (ATO) activities.
  • Provide mentorship and technical leadership to junior Linux and container platform administrators.
  • Provide technical briefings and system status updates to program leadership and government stakeholders as required.
  • The Senior Linux & OpenShift Systems Administrator reports to the Program Manager or IT Lead.
  • Other duties as assigned.
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