Know ATS Score
CV/Résumé Score
  • Expertini Resume Scoring: Our Semantic Matching Algorithm evaluates your CV/Résumé before you apply for this job role: Senior Linux System Administrator.
United States Jobs Expertini

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

Senior Linux System Administrator



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



    Your Complete Job Search Toolkit

    ✨ Smart • Intelligent • Private • Secure

    Start Using Our Tools

    Join thousands of professionals who've advanced their careers with our platform

    Rate or Report This Job
    If you feel this job is inaccurate or spam kindly report to us using below form.
    Please Note: This is NOT a job application form.


      Unlock Your Senior Linux Potential: Insight & Career Growth Guide


    • Real-time Senior Linux Jobs Trends in Alexandria, United States (Graphical Representation)

      Explore profound insights with Expertini's real-time, in-depth analysis, showcased through the graph below. This graph displays the job market trends for Senior Linux in Alexandria, United States using a bar chart to represent the number of jobs available and a trend line to illustrate the trend over time. Specifically, the graph shows 184904 jobs in United States and 168 jobs in Alexandria. This comprehensive analysis highlights market share and opportunities for professionals in Senior Linux roles. These dynamic trends provide a better understanding of the job market landscape in these regions.

    • Are You Looking for Senior Linux System Administrator Job?

      Great news! is currently hiring and seeking a Senior Linux System Administrator to join their team. Feel free to download the job details.

      Wait no longer! Are you also interested in exploring similar jobs? Search now: .

    • 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. Impartiality
      • 4. Integrity
      • 5. Accountability
      • 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.

    • What Are the Key Qualifications for Senior Linux System Administrator?

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

    • How Can I Improve My Chances of Getting Hired for Senior Linux System Administrator?

      To improve your chances of getting hired for Senior Linux System Administrator, consider enhancing your skills. Check your CV/Résumé Score with our free Tool. We have an in-built Resume Scoring tool that gives you the matching score for each job based on your CV/Résumé once it is uploaded. This can help you align your CV/Résumé according to the job requirements and enhance your skills if needed.

    • 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 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.
      • Dress Professionally: Choose attire appropriate for the company culture.
      • Prepare Questions: Show your interest by having thoughtful questions for the interviewer.
      • Plan Your Commute: Allow ample time to arrive on time and avoid feeling rushed.
      During the Interview:
      • Be Punctual: Arrive on time to demonstrate professionalism and respect.
      • Make a Great First Impression: Greet the interviewer with a handshake, smile, and eye contact.
      • Confidence and Enthusiasm: Project a positive attitude and show your genuine interest in the opportunity.
      • Answer Thoughtfully: Listen carefully, take a moment to formulate clear and concise responses. Highlight relevant skills and experiences using the STAR method.
      • Ask Prepared Questions: Demonstrate curiosity and engagement with the role and company.
      • Follow Up: Send a thank-you email to the interviewer within 24 hours.
      Additional Tips:
      • Be Yourself: Let your personality shine through while maintaining professionalism.
      • Be Honest: Don't exaggerate your skills or experience.
      • Be Positive: Focus on your strengths and accomplishments.
      • Body Language: Maintain good posture, avoid fidgeting, and make eye contact.
      • Turn Off Phone: Avoid distractions during the interview.
      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.

      Highlight your leadership skills, achievements, and strategic thinking abilities. Be prepared to discuss your experience with HR, including your approach to meeting targets as a team player. Additionally, review the Leidos's products or services and be prepared to discuss how you can contribute to their success.

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

    • How to Set Up Job Alerts for Senior Linux System Administrator Positions

      Setting up job alerts for Senior Linux System Administrator is easy with United States Jobs Expertini. Simply visit our job alerts page here, enter your preferred job title and location, and choose how often you want to receive notifications. You'll get the latest job openings sent directly to your email for FREE!