RHEL 8 Linux Systems Administrator Job Listing at SAIC in El Segundo, CA (Job ID 2611178)

Description

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.

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