• Lead Senior Systems

    ManTech (Chantilly, VA)
    **MANTECH** seeks a motivated, mission-oriented ** Senior Systems Administrator ** to join our team in **Chantilly, VA.** As the Lead Senior Systems ... or high school diploma/GED and 13 years of relevant systems administration experience with 3 + years in a...**Clearance Requirements:** + Must possess a current / active TS /SCI with Polygraph **Physical Requirements:** + Must be able… more
    ManTech (12/19/25)
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  • Senior Systems Administrator

    PingWind INC (Doral, FL)
    Senior Systems Administrator - SCITES Doral, FL (http://maps.google.com/maps?q=Doral+FL+USA) Job Type Full-time Description Location:Doral, Florida Required ... Clearance: TS -SCI - can start with a Secret ...a related IT career field Seeking an IT Microsoft Systems Administrator to help maintain the USSOUTHCOM… more
    PingWind INC (11/12/25)
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  • Senior Systems Administrator

    ManTech (Washington, DC)
    **MANTECH** seeks a motivated, career and customer-oriented ** Senior Systems Administrator ** to join our team in **Washington** **, DC** . **Responsibilities ... of five (5) years of related experience in computer hardware, software, networking systems , and in the set-up, configuration, use, and troubleshooting of computer … more
    ManTech (12/31/25)
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  • Senior Systems Administrator

    BigBear.ai (Annapolis Junction, MD)
    Overview BigBear.ai is seeking a Senior Systems Administrator with an active TS /SCI with Poly clearance to join and assist and meet mission needs for our ... do + Manage customer's Risk Management Framework and related systems to ensure optimized performance and security + Support...security + Support patching, upgrading, and migrating of Linux systems and VMs. + Support agile activities for … more
    BigBear.ai (12/30/25)
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  • Senior Systems Administrator

    ManTech (Chantilly, VA)
    **MANTECH** seeks a motivated and skilled ** Senior Systems Administrator ** to join our sustainment team in **Chantilly, VA.** In this role, you will support ... are not limited to:** + Provide hands-on O&M support for enterprise systems , including break-fix resolution and routine sustainment tasks + Monitor system… more
    ManTech (12/13/25)
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  • Senior IT Systems

    BAE Systems (Nashua, NH)
    …your career with BAE Systems . BAE Systems is seeking a Senior Closed Area Systems Administrator to provide comprehensive technical and operational ... Experience, & Skills** + US Citizenship. + Active US Secret Security Clearance and CompTIA Security or equivalent DoD...be available based on position level and/or job specifics. ** Senior IT Systems Administrator ** **118569BR**… more
    BAE Systems (11/25/25)
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  • Senior IT Systems

    Empirical Systems Aerospace, Inc. (San Luis Obispo, CA)
    Senior IT Systems Administrator -...permanent resident with an active or eligible security clearance ( Secret or Top Secret ). Language Skills ... Lead Position Summary The Senior IT Systems Administrator - Lead is responsible for overseeing the company's information technology infrastructure,… more
    Empirical Systems Aerospace, Inc. (12/31/25)
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  • Senior Linux Systems

    General Dynamics Information Technology (Macdill AFB, FL)
    …TO SUCCEED Bring your technology expertise and drive for innovation to GDIT. The Systems Administrator Senior must have: + Certification: Applicable DoD 8140 ... Requisition:** Regular **Clearance Level Must Be Able to Obtain:** Top Secret /SCI **Public Trust/Other Required:** None **Job...while you advance your career. Join GDIT as a ** Senior Linux Systems Administrator ** and… more
    General Dynamics Information Technology (12/18/25)
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  • Senior Linux Systems

    Leidos (Aurora, CO)
    **Description** **Leidos** has a new and exciting opportunity for a ** Senior Linux Systems Administrator ** in our **National Security Sector's (NSS) Cyber & ... in National** **Security!** Join our team as a **Linux Systems Administrator ** , where you'll provide crucial...Virtualization + **Security Clearance** : Must have an active Top Secret /SCI with Polygraph cssrc conmd If… more
    Leidos (12/19/25)
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  • Senior Windows Systems

    Adapt Forward (North Charleston, SC)
    Systems Administrator IV, Senior Windows Systems Administrator North Charleston, SC Secret Clearance with upgrade to Top Secret As a ... local and remote user desktop machines and servers. You will focus on systems and application stability, security, performance, and capacity management, as well as… more
    Adapt Forward (12/17/25)
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