Senior Linux Administrator

Job Description

Job Description

Job Title : Senior Linux Administrator

Job Category : IT

Location : On Site-Pentagon

Clearance : Active Secret Clearance (TS / SCI eligibility preferred)

SHR is a premier technology integrator solving our nation’s most complex modernization and readiness challenges across the defense, federal civilian, and intelligence markets. Our robust portfolio of offerings includes high-end solutions in systems engineering and integration; enterprise IT, including cloud services; cyber; software; advanced analytics and AI. With an intimate understanding of our customers’ challenges and deep expertise in existing and emerging technologies, we integrate the best components from our own portfolio and our partner ecosystem to deliver innovative, effective, and efficient solutions.

The Senior Linux Administrator is responsible for designing, implementing, and maintaining secure, scalable Linux-based systems within enterprise environments. This role plays a critical part in the optimization, automation, and cybersecurity compliance of mission-critical infrastructure. The administrator ensures operational stability, supports incident response, and leads system modernization and automation efforts.

Job Responsibilities :

• Manage Red Hat Enterprise Linux (RHEL) systems, including configuration, patching, and tuning.
• Implement and maintain automation using Ansible, Bash, and Python for configuration and deployment.
• Perform system hardening, vulnerability remediation, and compliance audits in alignment with DoD STIGs and NIST 800-53.
• Test, configure and implement policy for sssd, firewalld, chrony, fapolicyd, selinux, grub, 3rd party software and others.
• Troubleshoot complex system issues, conduct root cause analysis, and support high-severity incident response.
• Maintain detailed system documentation, SOPs, and recovery procedures.
• Support backup, disaster recovery, and continuity of operations planning (COOP).
• Collaborate with cybersecurity, networking, and application teams to ensure system integrity and availability

Education :

Experience :

Certifications :

Why Join Us :

At SHR, we foster an environment that promotes growth, innovation, and continuous learning. As a valued member of our team, you will :

Join us and make a difference!