• Senior Linux Administrator

    Leidos (Fort Belvoir, VA)
    **Description** The DTRA program at Leidos is seeking a ** Senior Linux Administrator ** in Fort Belvoir, VA to support the DTRA I3TS Infrastructure Services ... team to maintain and optimize the Linux production environment.The candidate will be responsible...+ Red Hat Certification - Red Hat Certified System Administrator (RHCSA) (Preferred) Come break things (in a good… more
    Leidos (12/30/25)
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  • Senior Linux /Unix Systems…

    SMX (Dahlgren, VA)
    Senior Linux /Unix Systems Administrator (4411)at SMX(View all jobs) (https://www.smxtech.com/careers/) Dahlgren, VA SMX is looking for a highly motivated ... Senior Linux /Unix Administrator to join our team in support of Naval Surface Warfare Center Dahlgren Division (NSWCDD) in Dahlgren, VA. The Senior Systems… more
    SMX (12/04/25)
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  • Senior Systems Administrator (Unix/…

    EPS Corporation (Dahlgren, VA)
    Senior Systems Administrator (Unix/ Linux ) - (758) Share this job as a link in your status update to LinkedIn. Job Title Senior Systems Administrator ... Job Description EPS Corporation is seeking a highly skilledSenior Systems Administrator (Unix/ Linux )to support enterprise-level networks and systems within a… more
    EPS Corporation (11/13/25)
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  • Senior Systems Administrator (Unix/…

    TekSynap (Dahlgren, VA)
    …& Qualifications** TheTekSynap is seeking a **S** **enior S** **ystem** ** Administrator (Unix/ Linux ).** The Senior Systems Administrator ... This position provides advanced system administration and engineering support for Unix/ Linux environments within the Navy enterprise. The Senior Systems… more
    TekSynap (10/31/25)
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  • Linux Engineer

    Arena Technical Resources, LLC (Chantilly, VA)
    …with current CI Polygraph required The Systems Engineering team is seeking a driven Senior Linux /UNIX Systems Administrator that is highly technical and ... focused. This ideal candidate is ready to operate as aTIER 3 level Linux /UNIX Administrator , experienced in managing large amounts of data and storage at sites… more
    Arena Technical Resources, LLC (11/29/25)
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  • Senior Linux Architect

    UIC Government Services and the Bowhead Family of Companies (Dahlgren, VA)
    **Overview** ** SENIOR LINUX ARCHITECT (CORPIT)** Bowhead seeks aSenior Linux Architect to lead the engineering and architecture of our enterprise RDT&E ... our Comply to Connect (C2C) initiative inDahlgren, VA. The Senior Linux Architect will design and implement...+ Must have either the Red Hat Certified System Administrator (RHCSA) or Red Hat Certified Engineer (RHCE) certification… more
    UIC Government Services and the Bowhead Family of Companies (12/03/25)
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  • Systems Administrator II Generalist Sr…

    V2X (Springfield, VA)
    …platforms, but there are also Linux distributions as well. + The Senior Systems Administrator II shall support the mid-level internal escalation tier(s) for ... challenges with integrity, respect, responsibility, and professionalism. We are hiring a Senior Systems Administrator II Generalist - Windows Server - active… more
    V2X (11/15/25)
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  • Senior System Administrator (2nd…

    RTX Corporation (Springfield, VA)
    …meaningful problems that create a safer, more secure world. Raytheon seeks a Systems Administrator to join a high-performing team at the heart of an important US ... meet its national security strategy. This is for an on-site system administrator sustaining and maintaining a VM-based data system supporting a high visibility… more
    RTX Corporation (01/07/26)
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  • Lead Senior Systems Administrator

    ManTech (Chantilly, VA)
    **MANTECH** seeks a motivated, mission-oriented ** Senior Systems Administrator ** to join our team in **Chantilly, VA.** As the Lead Senior Systems ... not limited to:** + Lead and supervise a team of system administrators (Windows/ Linux /VMWare) and IT support staff. + Design, implement, and maintain VMware vSphere… more
    ManTech (12/19/25)
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  • Senior System Administrator

    Amentum (Springfield, VA)
    …Security, & Intel space? If so, look no further. Amentum is seeking a ** Senior System Administrator ** to join our team of passionate individuals in ... Troubleshooting and providing AWS technical support to the NGA enterprise. * Senior level experience managing and administering Linux /Windows based systems… more
    Amentum (11/20/25)
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  • Senior Systems Administrator

    Leidos (Chantilly, VA)
    **Description** Leidos is seeking a System Administrator for a technical development program supporting the Sponsor's Attribute Services within the IDAM/ICAM ... space.As a System Administrator on this program, you will design, develop, implement,...of degree + Must be an expert in using Linux -based operating systems + Must have strong Bash skills… more
    Leidos (01/09/26)
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  • Senior System Administrator (C)

    SimIS Inc. (Dahlgren, VA)
    …and importance of others (work and win as a team). SimIS Inc seeks a Senior System Administrator to provide combat system simulation support to the Warfare ... activities. + Experience in Microsoft Windows computer operating systems, LINUX operating systems, CISCO Systems, computer security program administration, and… more
    SimIS Inc. (11/06/25)
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  • Senior IT Systems Administrator

    ManTech (Chantilly, VA)
    **MANTECH** seeks a motivated, career and customer-oriented ** Senior IT Systems Administrator ** to join our team in **Chantilly, VA.** **Responsibilities include ... ability to obtain one within 180 days. + Experience with Windows and Linux operating systems. + Experience providing help-desk end-user support for common desktop… more
    ManTech (12/03/25)
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  • Senior Systems Administrator (S)

    SimIS Inc. (Dahlgren, VA)
    …position and is contingent upon award. Job Description: SimIS, Inc. seeks a Senior Systems Engineer to lead systems engineering activities for a US Navy Training ... teams across multiple geographic locations + Experience managing Windows and Linux server environments + Knowledge of network security, firewalls, and intrusion… more
    SimIS Inc. (12/22/25)
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  • System Administrator

    Assertive Professionals (Chantilly, VA)
    System Administrator About the Organization Established in 2015,AssertiveProfessionals(AP), is anEconomically Disadvantaged Woman Owned Small Business ... with Polygraph Timeline Pipeline Description Assertive Professionalsis seeking aSystem Administrator with Polygraph supporting ourNational Security Customer in Chantilly,… more
    Assertive Professionals (01/07/26)
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  • Systems Administrator

    Arena Technical Resources, LLC (Springfield, VA)
    Systems Administrator Location: Springfield, VA, US Job ID: ATR 17769 Job Description Job Title: Systems Administrator Location: Springfield, VA Eligibility: ... point into our IT Operations career path, with opportunities to grow into senior , principal, and leadership positions as you deepen your technical expertise and… more
    Arena Technical Resources, LLC (01/10/26)
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  • Mid- Senior Network Engineer

    Infinity Systems Engineering (Alexandria, VA)
    …be more with us! Job Summary: We are seeking a skilled Systems Administrator /Network Engineer to join our mission-driven team. This position offers a broad scope ... and Cisco switches. + Perform systems administration on Windows and Linux platforms (updates, security, troubleshooting, management). + Maintain secure high… more
    Infinity Systems Engineering (01/03/26)
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  • Senior Principal Azure Cloud Engineer

    ManTech (Chantilly, VA)
    **MANTECH** seeks a motivated and experienced ** Senior Principal Azure Cloud Engineer** to join our team in **Chantilly, VA.** In this role, you will support ... + Implementing Azure security best practices and managing Windows and Linux servers + Leveraging Azure data services and containerization technologies alongside… more
    ManTech (12/16/25)
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  • Technical Lead - Poly Clearance Required

    General Dynamics Information Technology (Chantilly, VA)
    …Program Delivery and Execution **Skills:** High Performance Computing (HPC),Storage Linux ,System Administration **Experience:** 10 + years of related experience **US ... the existing and future system leveraging your knowledge of Linux and Windows system administration, virtualization with VMWare and...needs to the users. This role also is a senior technical resource contributing to the daily operations of… more
    General Dynamics Information Technology (12/29/25)
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  • OCONUS Field Engineer - TS/SCI Polygraph Required

    Leidos (Chantilly, VA)
    **Description** We are seeking mid to senior field engineers to join our international team in an exciting OCONUS location. The team is made-up of highly technical ... will have prior experience as either a systems engineer or systems administrator . Prior OCONUS experience and IP networking knowledge are desired. The program… more
    Leidos (11/07/25)
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