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Senior Linux System Administrator Job Opening In Alexandria – Now Hiring Leidos


Job description

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 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 obtain a Secret level clearance to be considered for this position.

The ability to support off-hours system administration on evenings and/or weekends (as needed) is required.

In addition this position will allow the ability to work remote 2-3 days a week but the need to be on site on a weekly basis is required.

Primary Responsibilities:

  • Provide support for installing and maintaining Linux servers using tools such as Ansible, Kickstart etc.
  • 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, Postgresql 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:

  • 12+ years of relevant experience doing system administration on Linux servers, networking equipment and security monitoring equipment.

    In addition a Bachelor’s Degree but additional experience maybe considered in lieu of a degree.
  • 8+ years of experience providing System Administration to DoD IT systems
  • IAT Level I: A+, CCNA-Security, Network+, SSCP, Security+ CE
  • US Citizen with the ability to obtain and maintain a Secret clearance
  • Ability to work evenings and weekends as needed
  • Preferred Qualifications:

  • 6+ years of experience providing Red Hat System Administration to DoD IT systems
  • IAT Level III: CASP CE, CCNP Security+ CE, CISA, CISSP, GCED, GCIH, CCSP 
  • Red Hat Certified System Administrator (RHCSA) or Red Hat Certified Engineer (RHCE)
  • CompTIA Linux+ or Linux Professional Institute LPIC-1
  • Experience leading a team
  • 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:

    September 25, 2025

    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 $126,100.00 - $227,950.00

    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.

    Required Skill Profession

    Computer Occupations


    • Job Details

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    The Work Culture

    An organization's rules and standards set how people should be treated in the office and how different situations should be handled. The work culture at Leidos adheres to the cultural norms as outlined by Expertini.

    The fundamental ethical values are:

    1. Independence

    2. Loyalty

    3. Impartiapty

    4. Integrity

    5. Accountabipty

    6. Respect for human rights

    7. Obeying United States laws and regulations

    What Is the Average Salary Range for Senior Linux System Administrator Positions?

    The average salary range for a varies, but the pay scale is rated "Standard" in Alexandria. Salary levels may vary depending on your industry, experience, and skills. It's essential to research and negotiate effectively. We advise reading the full job specification before proceeding with the application to understand the salary package.

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    Key qualifications for Senior Linux System Administrator typically include Computer Occupations and a list of qualifications and expertise as mentioned in the job specification. The generic skills are mostly outlined by the . Be sure to check the specific job listing for detailed requirements and qualifications.

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    Interview Tips for Senior Linux System Administrator Job Success

    Leidos interview tips for Senior Linux System Administrator

    Here are some tips to help you prepare for and ace your Senior Linux System Administrator job interview:

    Before the Interview:

    Research: Learn about the Leidos's mission, values, products, and the specific job requirements and get further information about

    Other Openings

    Practice: Prepare answers to common interview questions and rehearse using the STAR method (Situation, Task, Action, Result) to showcase your skills and experiences.

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    Be Punctual: Arrive on time to demonstrate professionalism and respect.

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    Final Thought:

    To prepare for your Senior Linux System Administrator interview at Leidos, research the company, understand the job requirements, and practice common interview questions.

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    By following these tips, you can increase your chances of making a positive impression and landing the job!

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