• COLSA Corporation (Huntsville, AL)
    Join our team as a Linux Systems Administrator , where you will support and manage a diverse mix of workstations, servers, and high-performance computing ... for a skilled professional with a solid foundation in Linux administration and a collaborative approach to problem-solving. +...12 years of related experience + Active DoD Top Secret Clearance with SCI eligibility + Must be able… more
    DirectEmployers Association (10/02/25)
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  • Tyto Athene (Santa Barbara, CA)
    **Description** Tyto Athene is searching for a ** Systems Administrator /Information System Security Officer** to join our CA team. **Responsibilities:** + Provide ... delivery pipeline to achieve Authority to Operate (ATO) + Provide system administration of Linux systems . + Maintain an inventory of hardware and software for… more
    DirectEmployers Association (12/06/25)
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  • Argonne National Laboratory (Lemont, IL)
    Argonne has an opportunity to serve as the System Administrator of the classified National Security Systems (NSS) for the Security Programs Facility (SPF). ... of Energy (DOE). It's functionally equivalent to a **Top Secret clearance** , allowing access to information classified up...Veeam, or similar enterprise backup solutions. + Familiarity with Linux Server Operating Systems such as RHEL,… more
    DirectEmployers Association (11/22/25)
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  • Applied Research Associates, Inc. (Eglin AFB, FL)
    …required for secure SIPRNet operations. This role works directly with the Sr. Systems Administrator and the broader systems -admin team leading engineering ... administrator for a SIPRNet capability supporting a DoD-owned secret -level enclave that already houses an air-gapped software-development environment. The… more
    DirectEmployers Association (11/21/25)
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  • COLSA Corporation (Huntsville, AL)
    …technical lead for a diverse infrastructure environment. The role spans Windows systems , Nutanix virtualization, Linux (RHEL), and enterprise storage. The ... professional experience. + Minimum of 8 years related experience + Active DoD Top Secret Clearance with SCI eligibility; US Citizenship required + Must be able to… more
    DirectEmployers Association (09/21/25)
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  • LINUX Systems Administrator

    General Dynamics Information Technology (Washington, DC)
    …of related experience **US Citizenship Required:** Yes **Job Description:** ** Linux Systems Administrator ** **- Active Top Secret Required** Seize your ... Regular **Clearance Level Must Be Able to Obtain:** Top Secret /SCI **Public Trust/Other Required:** None **Job Family:** IT Infrastructure...opportunity to make a personal impact as a ** Linux ** ** Systems Administrator ** with GDIT.… more
    General Dynamics Information Technology (12/05/25)
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  • Sr Principal Linux Systems

    Northrop Grumman (Boulder, CO)
    …will include but not be limited to the following: + Perform as primary Linux Systems Administrator for a classified government contract. + Communicate ... RELOCATION ASSISTANCE: No relocation assistance available CLEARANCE TYPE: Secret TRAVEL: Yes, 10% of the Time **Description**...be a condition of continued employment + Must have Linux Operating Systems support experience + … more
    Northrop Grumman (12/12/25)
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  • Linux Systems Administrator

    Lockheed Martin (Huntsville, AL)
    …Security\+, CASP, CISSP\), within 6 months of starting the position * Experience with Linux /UNIX Server and Desktop Operating Systems \(i\.e\. RH 7\.x, RH 8\.x, ... configuring, securing, hardening, remediating, testing, upgrading and decommissioning of Linux Workstations, servers, network switches, virtual servers, physical servers,… more
    Lockheed Martin (11/20/25)
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  • Linux Systems Administrator

    Lockheed Martin (Sunnyvale, CA)
    …more than 570 facilities that span more than 70 countries\. We are hiring a Linux System Administrator , Sr to support daily IT operations in our Sunnyvale, CA ... Business & Digital Transformation \(EBDT\) organization\. **Basic Qualifications:** * Active Secret clearance * Knowledge of Linux /UNIX Server Administration *… more
    Lockheed Martin (11/20/25)
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  • Linux /Windows Systems

    Lockheed Martin (King Of Prussia, PA)
    …6 months of start\) * CompTIA Linux \+ or Red Hat Certified Systems Administrator Certification * Ability to provide in\-depth monitoring, able to identify ... our customers achieve their missions\. The Work: As a Systems Administrator on the ECIW team, you...Virtualization Technologies * Must currently have an active Top Secret Clearance **Desired Skills:** * Windows and Linux more
    Lockheed Martin (12/11/25)
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  • Systems Administrator / Linux

    Lockheed Martin (Littleton, CO)
    …location for this position is Littleton, CO\. The Multi\-Function Information Systems Analyst assists users with resolving technical issues with applications, ... connectivity and other IT related issues\. The Multi\-Function Information Systems Analyst will assist with Information Assurance, performing environmental… more
    Lockheed Martin (12/04/25)
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  • Linux System Administrator

    CACI International (Sarasota, FL)
    …* * * **The Opportunity:** CACI has an immediate opening for a Linux Systems Administrator , with a Top Secret Clearance (TS/SCI) with polygraph for our ... network and fielded systems . CACI is seeking a development Systems Administrator with Linux experience for our Sarasota (FL) location. In… more
    CACI International (10/04/25)
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  • Principal Linux Administrator (Top…

    RTX Corporation (Richardson, TX)
    …RTX **Enterprise Services** team: **Role Overview:** RTX is seeking a Principal Linux Administrator to support a highly virtualized Enterprise infrastructure ... for a security clearance​ **Security Clearance:** DoD Clearance: Top Secret Job Description RTX Corporation is an Aerospace and...+ Perform software upgrades, patching, and system maintenance on Linux systems . + Troubleshoot issues and apply… more
    RTX Corporation (12/12/25)
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  • Top Secret Linux System…

    Insight Global (Colorado Springs, CO)
    …in the Colorado Springs, CO areas is looking for a qualified Linux System Administrator with a Top Secret clearance to join their team supporting a DoD ... program. The System Administrator will work to maintain multi-user computer systems...& IT infrastructure. Candidate will sustain operational Red Hat Linux systems and provide daily support for… more
    Insight Global (12/18/25)
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  • Senior Systems Administrator

    Alaka'ina Foundation Family of Companies (Kauai County, HI)
    …The Alaka`ina Foundation Family of Companies (FOCs) is looking for a Senior Linux Systems Administrator Range Network. The position will support ... Senior Systems Administrator ( Linux ) Location...Senior Systems Administrator ( Linux ) Location HI - Kaua'i...CLEARANCE: + Must be a US Citizen + Top Secret security clearance is required with T5 or equivalent… more
    Alaka'ina Foundation Family of Companies (11/20/25)
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  • Linux / AWS Systems

    Northrop Grumman (Morrisville, NC)
    …We Want You!** The Northrop Grumman Classified Solutions team is seeking an experienced ** Linux Systems Administrator ** to join its dynamic team of technical ... limited to the following:** + Serve as a senior Linux Systems Administrator within an...environments. + Candidates must have a current DoD **Top Secret /SCI** level security clearance to include a recent **Polygraph**… more
    Northrop Grumman (11/15/25)
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  • Senior Systems Administrator

    Amentum (Waimea, HI)
    …required + Linux + Linux + Red Hat Certified System Administrator (RHCSA) **Security Clearance** Top Secret security clearance is required with T5 ... Amentum is seeking a highly experienced Senior Linux System Administrator to oversee and...(DoD) environment. This role requires deep technical expertise in Linux systems , leadership in secure system administration,… more
    Amentum (09/24/25)
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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 ... Technology Job Description EPS Corporation is seeking a highly skilledSenior Systems Administrator (Unix/ Linux )to support enterprise-level networks and… more
    EPS Corporation (11/13/25)
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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 ... Center Dahlgren Division (NSWCDD) in Dahlgren, VA. The Senior Systems Administrator will work as part of...Top Secret + 6+ years' experience administering Linux /Unix systems and networks + Experience with… more
    SMX (12/04/25)
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  • Linux Systems Administrator

    UIC Government Services and the Bowhead Family of Companies (Dahlgren, VA)
    **Overview** LINUX SYSTEMS ADMINISTRATOR (RDTE) Bowhead seeks a Linux Systems Administrator to join our team in Dahlgren, VA. The Linux ... and management of servers, end-user workstations, and potentially clustered systems operating in both unclassified and classified network environments. +… more
    UIC Government Services and the Bowhead Family of Companies (12/12/25)
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