Leidos is seeking an experienced Linux Systems Administrator to support mission‑critical Scientific & Technical Intelligence (S&TI) 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.

Primary Responsibilities

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 NetApp storage systems.
Collaborate with cross‑functional engineering, cyber, and operations teams.

Required Qualifications

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.

Desired Qualifications

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

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If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo - because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 - and moving faster than anyone else dares.

Original Posting:

October 5, 2026

For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range:

Pay Range $92,300.00 - $166,850.00

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.

Job ID

R-00193935

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