RHEL 8 Linux Systems Administrator

Job ID 2611178

Location El Segundo, CA, US

Date Posted 2026-04-08

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 ORA_ON_SITE

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

Required Qualifications

• Bachelors Degree and five (5) years or more experience.
• Must have an active Top Secret clearance with in-scope SSBI/T5 background investigation.
• 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.
• Ability to obtain and maintain required security clearances if applicable.
  
  

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 $120,001 - $160,000. The estimate displayed represents the typical salary range for this position based on experience and other factors.