• Fidelis Administrator - Active TS/SCI…

    ENS Solutions (Reston, VA)
    …and manage operating system and application software as necessary. Support Linux & Windows systems engineering efforts in system design and evaluation, solution ... of start date. Optional Qualifications: + Experience with operating and maintaining Microsoft Windows and Linux servers to include operating systems . + Prior… more
    ENS Solutions (12/27/25)
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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 ... TS/SCI clearance and be willing to obtain a CI Polygraph Job Description: Night Shift Schedule: 530 pm to...assess scope and impact. - Correlate events across multiple systems to recognize patterns, performance anomalies, and early indicators… more
    Arena Technical Resources, LLC (01/08/26)
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  • Physical Security System Administrator 4

    M. C. Dean (Chantilly, VA)
    …Security System Administrator 4** to join our **Security and Electronic Systems (SES)** business Unit. As part of **(SES)** Strategic Business Unit you will ... for federal, local and commercial customers across high-growth markets. As a System Administrator for our Physical Security Systems , you will be responsible for… more
    M. C. Dean (10/23/25)
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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 ... or equivalent) or ability to obtain one within 180 days. + Experience with Windows and Linux operating systems . + Experience providing help-desk end-user support… more
    ManTech (12/03/25)
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  • IT Systems Administrator

    ManTech (Chantilly, VA)
    **MANTECH** seeks a motivated, career and customer-oriented **IT Systems Administrator ** to join our team in **Chantilly, VA.** **Responsibilities include but ... to obtain one within 180 days. + System Experience: Experience with both Windows and Linux operating systems . + End-User Support: Experience providing help-desk… more
    ManTech (11/19/25)
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  • System Administrator

    CACI International (Chantilly, VA)
    System Administrator Job Category: Information Technology Time Type: Full time Minimum Clearance Required to Start: TS/SCI with Polygraph Employee Type: Regular ... Local * * * **The Opportunity:** CACI is seeking a highly skilled **System Administrator ** to join our team in supporting a Government customer. The ideal candidate… more
    CACI International (12/29/25)
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  • Mid System Administrator

    Parsons Corporation (Quantico, VA)
    …CKA - Confirms ability to install, configure, and manage Kubernetes clusters. + Azure Administrator Associate or MCSE: Windows Server - Credential for managing ... **Job Description:** Parsons is looking for an amazingly talented **Mid System Administrator ** to join our team! **What You'll Be Doing:** + Maintains smooth… more
    Parsons Corporation (11/15/25)
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  • Systems Administrator

    General Dynamics Information Technology (Fort Belvoir, VA)
    …**Clearance Level Must Be Able to Obtain:** Top Secret SCI + Polygraph **Public Trust/Other Required:** None **Job Family:** IT Infrastructure and Operations ... group of computers running on one or more operating systems . + Understand all the different systems ...and analysis. + UNIX/LINUX System Administration - Preferred + Windows System Administration - Preferred + Shift work (Panama… more
    General Dynamics Information Technology (12/02/25)
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  • System Operations/ Administrator

    Sciolex Corporation (Chantilly, VA)
    …no bachelor's degree is held. Active Top Secret/SCI clearance with a Counter-Intelligence Polygraph Experience as a desktop system administrator or in a similar ... IT support role. Compliant with DoD Directive 8570 Knowledge of Windows and Linux operating systems . CompTIA Security+ or ability to obtain within 90 days of… more
    Sciolex Corporation (10/14/25)
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  • System Administrator

    Parsons Corporation (Centreville, VA)
    …preferably within the intelligence community or DoD. + Strong proficiency in managing Windows and Linux operating systems . + Extensive experience with Cisco ... possible. **Job Description:** **What You'll Be Doing:** + Manage and maintain Windows and Linux servers, ensuring optimal performance, security, and availability. +… more
    Parsons Corporation (12/04/25)
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