RHEL 8 Linux Systems Administrator

Job ID: 2614334

Location: El Segundo, CA, US

Date Posted: 2026-07-08

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

This is you:
Bachelors Degree and five (5) years or more experience.
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: $120,001 - $160,000. The estimate displayed represents the typical salary range for this position based on experience and other factors.


SAIC is a premier technology integrator providing full life cycle services and solutions in the technical, engineering, intelligence, and enterprise information technology markets. SAIC is Redefining Ingenuity through its deep customer and domain knowledge to enable the delivery of systems engineering and integration offerings for large, complex projects. SAIC's approximately 15,000 employees are driven by integrity and mission focus to serve customers in the U.S. federal government. Headquartered in Reston, Virginia, SAIC has annual revenues of approximately $4.5 billion. For more information, visit saic.com. For information on the benefits SAIC offers, see .