Linux Systems Administrator
Location: Suitland, MD
Security Clearance: Active TS/SCI Required
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, 2026For 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.
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.
Skills Required
- Bachelor’s degree and 8+ years of experience, or Master’s degree and 6+ years of experience; additional experience may substitute for a degree
- Active TS/SCI security clearance in DISS
- Active DoD 8570 IAT Level III certification, such as CASP, CISSP, or GCIH, or ability to obtain within 30 days of offer acceptance
- Current Red Hat certification, with RHCA preferred, or 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
- Experience supporting mission systems or scientific and engineering software environments
Leidos Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Leidos and has not been reviewed or approved by Leidos.
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Healthcare Strength — Healthcare coverage is described as comprehensive, with multiple plan options, low office-visit copays in some plans, and access to mental health and wellness support tools. The availability of HSA/FSA options and employer contributions is positioned as a meaningful part of the total package.
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Retirement Support — Retirement benefits are framed as a strong component of total rewards, highlighted by a 401(k) match and immediate vesting in the standard package. The Employee Stock Purchase Plan is also presented as an additional long-term wealth-building feature.
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Wellbeing & Lifestyle Benefits — Wellbeing and lifestyle supports extend beyond core insurance, including wellness programs, fitness-related stipends, and assistance resources. Work flexibility and related perks are also included as part of the broader rewards experience.
Leidos Insights
What We Do
We Are Leidos For 50 years we have been tackling some of the biggest problems that face our nation and our world. OUR MISSION Through our culture of innovation and history of performance, we develop deep customer trust built on integrity and create enduring solutions that improve our world. Leidos is a science and technology solutions leader working to address some of the world’s toughest challenges in the defense, intelligence, homeland security, civil, and healthcare markets. The company’s 43,000 employees support vital missions for government and commercial customers. Headquartered in Reston, Va., Leidos reported annual revenues of approximately $11.09 billion for the fiscal year ended January 3, 2020. Leidos was cited for the meaningful work employees perform that is challenging, impactful, and aligned with our customers’ missions as reasons professionals want to work and stay at our company. Leidos has also been named to lists including Forbes’ Best Employers for Diversity, Forbes’ America’s Best Employers for Women, Military Times Best for Vets Employers, and Ethisphere Institute’s World's Most Ethical Companies®. Employees enjoy career enrichment opportunities available through mobility and development and experience rewarding relationships with supportive supervisors and talented colleagues and customers. Employees appreciate our flexible work environment, allowing for and encouraging a true work-life balance. Our professionals are also excited about our Employee Resource Groups, like the newly launched Collaborative Outreach with Remote and Embedded Employees (CORE), which strives to create an environment where every employee, regardless of location, feels fully engaged as a valued employee of Leidos. Your most important work is ahead.
