• Principal System Administrator

    RTX Corporation (El Segundo, CA)
    …US citizenship is required, as only US citizens are eligible for a security clearance ​ **Security Clearance :** Secret - Current At Raytheon, the foundation ... to prevent security threats, secure the integrity of our systems and support IT infrastructures around the world. **Sr....direct experience. + Active and transferable US government issued secret security clearance is required prior to… more
    RTX Corporation (12/09/25)
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  • Senior Systems Administrator

    TekSynap (Fort Belvoir, VA)
    …perception, and ability to adjust focus. **WORK AUTHORIZATION/SECURITY CLEARANCE ** Top- Secret SCI SSBI required to perform system engineering and ... (3) or more years of experience. + BS/BA + Top- Secret clearance required with SCI or SCI...8750 IAT Level II **Overview** We are seeking a ** Systems Administrator ** to support the Defense Threat… more
    TekSynap (12/13/25)
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  • Linux System Administrator with CI…

    Parsons Corporation (Centreville, VA)
    …your talent and redefine what's possible. **Job Description:** Our Special Programs and Systems team is hiring Linux System Administrators with a passion for ... small team environment to enable operational success of deployed systems . This role includes system design, configuration,...a US Citizen + Must possess and maintain Top Secret SCI clearance with CI poly +… more
    Parsons Corporation (11/21/25)
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  • IT Systems Administrator

    Leidos (Washington, DC)
    system planning sessions, providing actionable recommendations. **Required Security Clearance :** + Active Top Secret . **Basic Qualifications.** + Bachelor's ... **Description** The Leidos National Security Sector is seeking an experienced ** Systems Administrator ** to provide technical expertise installing, configuring,… more
    Leidos (12/13/25)
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  • Cyber Systems Administrator

    L3Harris (Camden, AR)
    …sea and cyber domains in the interest of national security. Job Title: Cyber Systems Administrator Job Code: 31690 Job Location: Camden, Arkansas Job Schedule: ... 4/10 Job Description: Provide enterprise systems Windows administration, configuration, management, maintenance, and troubleshooting for...required. The role is an on-site role requiring a Secret clearance and is an exciting role… more
    L3Harris (12/05/25)
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  • Systems Administrator - Junior…

    Amentum (Dahlgren, VA)
    …(IAT) Level 2 or higher under specialty area 45 - System Administrator with certification in current Operating Systems and Information Security. This ... Dahlgren, VA. You will be part of our growing systems & software engineering team and contribute to our.... Note: US Citizenship is required to obtain a Secret Clearance . + Candidates must maintain a… more
    Amentum (12/16/25)
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  • Systems Administrator

    Guidehouse (Bethesda, MD)
    **Job Family** **:** Systems Engineering **Travel Required** **:** None ** Clearance Required** **:** Active Top Secret SCI (TS/SCI) **What You Will Do:** + ... Ansible for infrastructure automation and orchestration + Set up administrator and service accounts, maintain system documentation,...You Will Need:** + An ACTIVE and MAINTAINED "TOP SECRET /SCI (TS/SCI)" Federal or DoD security clearance more
    Guidehouse (12/10/25)
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  • Alternate CRO Cyber Systems

    SAIC (Kirtland AFB, NM)
    **Description** SAIC is looking for an experienced **Alternate CRO Cyber Systems Administrator ** with a systems administration background to be an alternate ... will be the alternate CRO for a non-collateral account and a cybersecurity systems administrator implementing and maintaining cyber tools such as eMASS, Xacta,… more
    SAIC (12/03/25)
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  • Network/ Systems Administrator

    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). ... by the US Department of Energy (DOE). It's functionally equivalent to a **Top Secret clearance ** , allowing access to information classified up to that level,… more
    Argonne National Laboratory (11/22/25)
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  • Senior Database Administrator (Alis)

    Lockheed Martin (Beaufort, SC)
    …anti\-virus/anti\-spyware updates, and patch updates * Red Hat Enterprise Linux System Administrator * Importing/Exporting large data volumes * Familiarity ... **THE WORK** Join the Lockheed Martin Rotary and Mission Systems Field Sustainment Team\. Our customers include both the...supporting the US military/Foreign Military * A US DoD Secret Clearance * COMSEC Experience **Security … more
    Lockheed Martin (09/25/25)
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