About the role

Aplyr's Quick Take

This role is for a Senior Linux System Administrator focused on supporting and enhancing Linux servers for the Department of Defense. You'll be troubleshooting issues, managing network equipment, and leading the migration to a hybrid cloud setup. It's an individual contributor role within a team environment, requiring on-site work in Alexandria, VA.

Good fit

Ideal candidates have 8+ years of experience in system administration, particularly with DoD IT systems, and hold an active Secret clearance. A proactive, problem-solving mindset and familiarity with security tools are essential.

Worth noting

The role emphasizes a fast-paced, mission-driven environment, which may not suit those looking for a stable, predictable work setting. The salary range is quite broad, reflecting varying levels of experience and responsibility.

The Test and Training Enabling Architecture (TENA) program at Leidos is looking to add a Senior Linux System Administrator. Our mission is to develop tools for the United States Department of Defense test and training communities, to increase the speed of the development cycle, to get capabilities to the warfighter more rapidly. The Senior Linux System Administrator will work within a team engineers, developers and system administrators, adding new capabilities to our enclaves, as well as ensuring the existing systems are secure and performing as intended.

This position is required to work on-site in our Alexandria, VA office.

Primary Responsibilities:

Provide support for installing and maintaining Linux servers.
Provide technical leadership for migrating on premise infrastructure to hybrid cloud solution.
Provide support for troubleshooting from OS to application-level issues.
Manage networking equipment including switches, routers and firewalls.
Manage configuration and maintenance of core enclave infrastructure services including DCHP, DNS, e-mail, Apache Web Servers, Tomcat application servers, Atlassian applications, MariaDB database servers.
Configure and monitor security tools required for DoD networks.
Participate and contribute to design discussions related to improving the capabilities, performance and security posture of new and existing services.

Basic Qualifications:

US Citizen with at least an active Secret clearance.
Bachelor’s degree with 8+ years of experience or a Master’s degree with 6+ years of experience. Additional experience may be considered in lieu of a degree.
5+ years of experience providing System Administration to DoD IT systems.
DoD 8570 IAT level I compliant.

Preferred Qualifications:

10+ years of experience providing System Administration to DoD IT systems.
DoD 8570 IAT level III compliant.

DABAOPP1

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:

June 4, 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 $107,900.00 - $195,050.00

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.

Aplyr's read

Leidos is a leading force in defense and technology, attracting professionals skilled in IT, engineering, and intelligence analysis.
Synthesized from recent postings & public sources

What's promising

•Leidos has a strong presence in defense and technology sectors, offering stability and growth opportunities.
•The company invests heavily in research, fostering innovation in IT and biomedical fields.
•Leidos offers diverse roles, from AI development to network engineering, appealing to a broad range of tech professionals.

What to watch

•Leidos' heavy reliance on government contracts can lead to revenue volatility due to policy changes.
•The competitive defense sector may limit rapid advancement for employees.
•Complex projects might require long hours, impacting work-life balance.

Why Leidos

•Leidos is distinguished by its focus on integrating advanced technologies in defense and healthcare.
•The company excels in handling large-scale, complex government projects.
•Leidos' commitment to cybersecurity is evident in its specialized roles like Cyber-Supply Chain Risk Management.

Aplyr’s read is generated by AI from public sources. Was it useful?