• Endpoint Security as a Service (ESS) Engineer/…

    Leidos (Washington, DC)
    …network components and develop cutting-edge technical solutions. **Basic Qualifications:** + Active ** Top Secret clearance** (SCI eligible). + **8+ years of IT ... mission.** **What You'll Do** As an ESS Engineer and Administrator , you won't just maintain systems -...a knack for troubleshooting under pressure. **Preferred Qualifications:** + ** TS /SCI clearance** and **DOD 8570 IAT Level III… more
    Leidos (10/03/25)
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  • Linux Administrator - ACAS

    CACI International (Springfield, VA)
    …Report as vendor updates are received **You'll Bring These Qualifications** + Top Secret /SCI clearance (current), with the ability to successfully ... Linux Administrator - ACAS Job Category: Information Technology Time...Time Type: Full time Minimum Clearance Required to Start: TS /SCI Employee Type: Regular Percentage of Travel Required: Up… more
    CACI International (11/10/25)
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  • Senior System Administrator

    CACI International (Annapolis Junction, MD)
    …optimize a wide variety of IT systems . We are seeking an accomplished System Administrator - Level 4 to lead and support complex enterprise IT environments, ... Senior System Administrator Job Category: Information Technology...and secure enterprise IT environments + Advanced knowledge of systems design, hardware/software integration, and interdependent system … more
    CACI International (10/30/25)
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  • System Administrator (Level 4)

    Kaizen Approach, Inc (Annapolis Junction, MD)
    Kaizen Approach is currently seeking a Systems Administrator to provide implementation, troubleshooting, and maintenance support for complex Information ... manage UNIX, Linux, and Windows (or other applicable) operating systems , install and load operating system software,...minimum of twenty (20) years of experience as a System Administrator (SA) on programs and contracts… more
    Kaizen Approach, Inc (11/11/25)
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  • Linux Systems Administrator

    BCMC (Arlington, VA)
    …of the customer mission. Responsibilities: - Serve as a lead Linux Systems Administrator overseeing Red Hat Enterprise Linux (RHEL) environments across ... - US Citizenship - Must have an active DoD Secret clearance, TS /SCI clearance is preferred. -...5+ years of directly relevant experience as a Linux System Administrator . - 3+ years of experience… more
    BCMC (10/16/25)
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  • System Administrator

    ManTech (Annapolis Junction, MD)
    **ManTech seeks a motivated, career and customer-oriented System Administrator II to join our team at our Annapolis Junction, MD location.** **Responsibilities ... consistent maintenance, configuration, and reliable operation of critical computer systems , network servers, and virtualization environments, upholding system … more
    ManTech (09/05/25)
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  • Systems Administrator

    SAIC (Washington, DC)
    …upon contract award, with an anticipated decision expected by fall 2025.** The System Administrator responsibilities include, but are not limited to: + Manage ... **Description** SAIC, a leading provider of systems engineering & integration, systems development...Access Control Management (ICAM) policy and communicate and coordinate system changes. **Qualifications** + Active TS /SCI with… more
    SAIC (09/06/25)
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  • Nissc III Pursuit

    SAIC (Washington, DC)
    …+ Security Administrator + Specialty and Logistics Engineering + Software Engineer + Systems Administrator + Systems Architect + Systems Engineer + ... among us, the nation needs to know. Immediately. **Qualifications** **Qualifications:** + Active Secret up through Top Secret /SCI clearance + Minimum… more
    SAIC (11/06/25)
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  • Lab Manager III

    ARSIEM (Arlington, VA)
    …clients in Arlington, VA. Responsibilities + Serve as a lead Linux Systems Administrator overseeing Red Hat Enterprise Linux (RHEL) environments across ... 5+ years of directly relevant experience as a Linux System Administrator . + 3+ years of experience...Secret clearance and be able to obtain a TS /SCI clearance. Must be able to obtain DHS Suitability.… more
    ARSIEM (11/12/25)
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  • Senior Information System Security Officer

    The MITRE Corporation (Mclean, VA)
    …a PhD; or equivalent combination of related education and work experience. + Active Top Secret clearance with SCI eligibility. Ability to obtain and maintain a ... + Previous experience operating as a SCI/SAP ISSO, ISSE, System Administrator , or ISSM. + Strong analytical...candidate to have a minimum of the following clearance(s): Top Secret This requisition requires the hired… more
    The MITRE Corporation (11/11/25)
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