Senior Linux Systems Administrator - Classified Security

Johns Hopkins Applied Physics Laboratory

Laurel (MD)

On-site

USD 105,000 - 290,000

Full time

14 days+

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Job summary

Johns Hopkins Applied Physics Laboratory is seeking a Linux Systems Administrator to design, deploy, and maintain classified Linux systems, ensuring security, performance, and reliability in a fast-paced environment.

The role requires deep Linux expertise, DoD 8570 certification or ability to obtain within 6 months, and a TS/SCI with poly clearance. You will work with ISSO/ISSM and cross-functional teams to protect IT infrastructure.

Qualifications

Bachelor’s degree in Computer Science, Information Technology, related field or equivalent professional experience.
Linux operating systems (Red Hat, CentOS, or similar) and administration knowledge.
5+ years Linux systems administration experience.
RHCSA certification.
DoD 8570 certification (Security+ or CISSP) or ability to obtain within 6 months.
Active Top Secret SCI w/poly clearance; US citizenship required.

Responsibilities

Manage, configure, and maintain classified Linux-based systems, including OS installation, patches, monitoring, and performance.
Implement security measures following compliance policies, perform audits, vulnerabilities assessments, and patching.
Coordinate with ISSO/ISSM to validate systems and security posture; balance security with project requirements.
Provide technical support in a classified environment, assist on projects, manage user accounts and access controls.
Respond to incidents quickly, document SOPs, configurations, troubleshooting guides, and maintain knowledge base.