Senior Linux Systems Administrator - Classified Security

Johns Hopkins Applied Physics Laboratory; Laurel (MD); On-site; USD 105,000 - 290,000; Full time

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.

Skills

Linux system administration

Security patching

Troubleshooting

Documentation

Active Directory integration

STIGs configuration

Nagios/Thruk monitoring

Virtualization (VMware/KVM)

Containerization (Docker/Podman/K8s)

Red Hat/CentOS administration

RHCSA

Education

Bachelor’s degree in Computer Science/IT or related field

Tools

SaltStack

Puppet

Ansible

Chef

Job description

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.