Linux Systems Administrator

Location:

Suitland, MD Security Clearance:
Active TS/SCI

Leidos is seeking an experienced Linux Systems Administrator to support mission‑critical Scientific & Technical Intelligence (S&T I) systems at the Office of Naval Intelligence (ONI) in Suitland, MD. This role provides advanced Linux, cybersecurity, and enterprise infrastructure support within a dynamic classified environment enabling engineering analysis, modeling, and high-performance computing.

• Administer and optimize Linux server environments (RHEL & RPM-based).
• Perform system monitoring, issue resolution, patching, STIG hardening, and performance tuning.
• Execute and document IAVA/IAVB implementation and vulnerability remediation.
• Support VMware, NAS/NFS/CIFS, automation tools, and cluster services.
• Maintain and update HBSS, ACAS scanning, Trellix, and other security tools.
• Manage firewall rule updates, IDS/IPS configurations, and endpoint protection.
• Troubleshoot and maintain Net App storage systems.
• Collaborate with cross-functional engineering, cyber, and operations teams.

• Bachelor’s degree with 8+ years of experience, or Master’s degree with 6+ years of experience.
• Additional experience may be considered in lieu of a degree.
• Active TS/SCI clearance (in DISS).
• Active DoD 8570 IAT Level III certification (e.g. CASP, CISSP, GCIH, Etc.) or higher or the ability to obtain within 30 days of offer acceptance.
• Current Red Hat Certification (RHCA preferred) or the ability to obtain within 30 days of offer acceptance.
• Strong enterprise Linux administration and troubleshooting expertise.
• Experience with VMware, storage systems, secure transport protocols, and security configuration.
• Excellent communication, problem-solving, and customer support skills.

• Experience with FLEXnet License Manager.
• Background supporting mission systems or scientific/engineering software environments.

• Competitive compensation
• Health and Wellness programs
• Income Protection
• Paid Leave and Retirement

More details are available here.

Leidos will never ask you to provide payment-related information at any part of the employment application process. And Leidos will communicate with you only through emails that are sent from a  email address. If you receive an email purporting to be from Leidos that asks for payment-related information or any other personal information, please report the email to

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law.

Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.

Pay Range:
Pay Range $92,300.00 - $ The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $17.2 billion for the fiscal year ended January 2, 2026. For more information, visit