$120,001–$160,000 Per Year
Access Control, Aerospace and Defense, Ansible, Auditing, Authentication, Automation, Background Investigation, Bash Scripting, Benchmarking, Best Practices, Computer Security, Computer Systems, Configuration Management, Cross-Domain Solutions (CDS), Docker, Documentation, Documentation Standards, Emerging Technology, Identify Issues, Incident Response, Information Technology & Information Systems, Internet Security, K Virtual Machine (KVM), Linux Administration, Logical Volume Manager (LVM), Machine Tool, Maintain Compliance, Network Connectivity, Performance Analysis, Problem Solving Skills, Professional Services, Python Programming/Scripting Language, Red Hat Linux Operating System, Regulatory Compliance, Security Compliance, Security-Enhanced Linux (SELinux), Sensitive Compartmented Information (SCI), Single Scope Background Investigation (SSBI), Software Patches, System Integration (SI), Systems Administration/Management, Systems Maintenance, Top Secret Clearance, Unix Shell Programming, VMWare, Virtualization, Work From Home
RHEL 8 Linux Systems Administrator
Job ID: 2614334
Location: El Segundo, CA, United States
Date Posted: Jul 8, 2026
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: On-Site
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Job 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
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.
Overview
SAIC accepts applications on an ongoing basis and there is no deadline.
SAIC is a premier mission integrator focused on advancing the power of technology and innovation to serve and protect our world. Our robust portfolio of offerings across the defense, space, intelligence, and civilian markets includes secure high-end solutions in mission IT, enterprise IT, engineering services, and professional services. We integrate emerging technology, rapidly and securely, into mission critical operations that modernize and enable critical national imperatives.
We are approximately 23,000 strong; driven by mission, united by purpose, and inspired by opportunities. SAIC is an Equal Opportunity Employer. Headquartered in Reston, Virginia, SAIC has annual revenues of approximately $7.3 billion. For more information, visit saic.com. For ongoing news, please visit our newsroom.
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S
Science Applications International Corp
SAIC is a premier Fortune 500® technology integrator driving our nation's digital transformation. Our robust portfolio of offerings across the defense, space, civilian, and intelligence markets includes secure high-end solutions in engineering, IT modernization, and mission solutions. Using our expertise and understanding of existing and emerging technologies, we integrate the best components from our own portfolio and our partner ecosystem to deliver innovative, effective, and efficient solutions that are critical to achieving our customers' missions.
We are a team of 26,000 strong driven by mission, united purpose, and inspired by opportunity. Headquartered in Reston, Virginia, SAIC has annual revenues of approximately $7.1 billion. For more information, visit saic.com.