RHEL 8 Linux Systems Administrator

Job ID 2614545

Location

El Segundo CA US Date Posted 2026-07-14 Category Information Technology Subcategory Sys Administrator Schedule Full-Time Shift Day Job Travel Yes - 10% of the time Minimum Clearance Required TS.SCI Clearance Level Must Be Able to Obtain TS/SCI with Poly Potential for Remote Work ORAONSITE

Description

We are seeking an experienced RHEL 8+ Linux Systems Administrator specializing in Red Hat Enterprise Linux (RHEL) 8 or later to support and maintain secure mission-essential air gapped information systems. You will have a strong background in enterprise Linux administration cybersecurity best practices and operations within isolated or high-assurance computing environments working in our El Segundo CA office.

Key Responsibilities

Install configure harden and maintain RHEL 8+ systems across air gapped environments. Perform system patching repository management and package deployment without external network connectivity. Develop and maintain system baselines documentation and configuration standards aligned with security and compliance requirements. Monitor system performance troubleshoot issues and support incident response activities. Implement STIGs CIS benchmarks and other hardening guidelines as required. Support secure configuration of system services authentication logging auditing and access controls. Coordinate with cybersecurity network and GRC teams to ensure ongoing compliance with internal and external controls. Automate routine tasks using shell scripting Ansible or similar tooling. Assist with system integration data transfers and cross-domain solutions in isolated environments. Collaboratively work across cybersecurity GRC and infrastructure teams. Solid problem-solving skills and a security-first mindset.

Qualifications

This is you Bachelors Degree and five

• years or more experience or an additional 4 years of experience may be used in lieu of degree. Must have an active Top Secret clearance with in-scope SSBI/T5 background investigation with the ability to obtain and maintain Sensitive Compartmented Information and Special Access Program accesses. Must be willing to be nominated for access to Sensitive Compartmented Information and Special Access Programs and consent to a polygraph examination (as required). Must have applicable DoD 8140 (formerly DoD 8570) certification (e.g. Security+ CISSP or equivalent). Must have strong documentation process experience. 3+ years administering Linux systems in an enterprise setting. Hands-on experience with RHEL 8 or later. Demonstrated experience supporting air gapped isolated or high-security information systems. Strong understanding of system hardening patching and configuration management in offline environments. Proficiency with Bash or Python scripting. Knowledge of SELinux systemd LVM and networking fundamentals. Familiarity with security compliance frameworks STIGs CIS benchmarks or similar.

Preferred Qualifications

Red Hat certifications (RHCSA RHCE). Experience with Ansible or other automation/orchestration tools. Background supporting systems in defense aerospace or other regulated industries. Experience with virtualization (KVM VMware) and container technologies (Podman Docker Kubernetes) in restricted environments. Target salary range $120001 - $160000. The estimate displayed represents the typical salary range for this position based on experience and other factors.