Senior Linux Systems Admin

Description

The Test and Training Enabling Architecture (TENA) program at Leidos is looking to add a Senior Linux Systems 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 Sr. 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 located in Alexandria, VA and you must be able to work on site as needed. There is an ability to telework 2-3 days a week. All candidates must be within a reasonable driving distance to the work location to be considered.

• 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, Maria
  
  DB 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

• Bachelor's Degree with 12+ years of experience or a Master's Degree with 10+ years of experience. Additional experience may be considered in lieu of a degree.
• US Citizen with the ability to obtain and maintain at least a DoD Secret clearance within 120 days of your employment.
• 8+ years of relevant experience doing system administration on Linux servers, networking equipment and security monitoring equipment.
• DoD 8570 IAT level I compliant

• US Citizen with an active DoD Secret clearance or higher and the ability to maintain that clearance during your employment.
• 10+ years of experience providing Red Hat System Administration to DoD IT systems
• DoD 8570 IAT level III compliant
• Red Hat Certified System Administrator (RHCSA) or Red Hat Certified Engineer (RHCE)

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:
February 13, 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 $ - $

The Leidos pay range for this job level is a general guideline onlyand 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 $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit

Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available at

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