• HBSS Administrator

    Leidos (Fort Belvoir, VA)
    **Description** Leidos is seeking a skilled **Senior HBSS Administrator in Fort Belvoir, VA** to join the I3TS team supporting DTRA. The I3TS program provides ... candidate will be responsible for ensuring the security and integrity of IT systems by running their Endpoint Security with experience in Trellix and Microsoft… more
    Leidos (12/03/25)
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  • Senior Systems Administrator

    Leidos (Chantilly, VA)
    …that provides attribute data via an LDAP interface to hundreds of various Sponsor systems Required Qualifications + Active TS /SCI with Polygraph + BS degree and ... **Description** Leidos is seeking a System Administrator for a technical development program supporting the...of degree + Must be an expert in using Linux -based operating systems + Must have strong… more
    Leidos (10/10/25)
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  • Lead Senior Systems Administrator

    ManTech (Chantilly, VA)
    **MANTECH** seeks a motivated, mission-oriented **Senior Systems Administrator ** to join our team in **Chantilly, VA.** As the Lead Senior Systems ... + Lead and supervise a team of system administrators (Windows/ Linux /VMWare) and IT support staff. + Design, implement, and...or high school diploma/GED and 13 years of relevant systems administration experience with 3 + years in a… more
    ManTech (12/19/25)
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  • Log Aggregation Administrator , SME

    CGI Technologies and Solutions, Inc. (Arlington, VA)
    …are beneficial. * Knowledge: Familiarity with the following is essential: o Operating systems , including Linux and Windows. o Cloud computing concepts and ... **Log Aggregation Administrator , SME** **Category:** Administration **Main location:** United States,...processing, and analysis of log data from various IT systems . This role is critical for monitoring system performance,… more
    CGI Technologies and Solutions, Inc. (12/11/25)
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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 ability to obtain one within 180 days. + Experience with Windows and Linux operating systems . + Experience providing help-desk end-user support for common… 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 ... one within 180 days. + System Experience: Experience with both Windows and Linux operating systems . + End-User Support: Experience providing help-desk support… more
    ManTech (11/19/25)
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  • Cloud Administrator

    CACI International (Chantilly, VA)
    …Responsibilities:** + Build, configure, and administrate all aspects of Red Hat Enterprise Linux (RHEL) + Configure systems to meet STIG requirements + Manage ... Cloud Administrator Job Category: Information Technology Time Type: Full...Time Type: Full time Minimum Clearance Required to Start: TS /SCI with Polygraph Employee Type: Regular Percentage of Travel… more
    CACI International (12/03/25)
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  • Network Infrastructure/System Administrator

    CACI International (Mclean, VA)
    …hardening in accordance with industry best practices + Knowledge of different operating systems (Microsoft, Unix, Linux , etc.) + Attention to detail, problem ... Network Infrastructure/System Administrator Job Category: Information Technology Time Type: Full...Time Type: Full time Minimum Clearance Required to Start: TS /SCI with Polygraph Employee Type: Regular Percentage of Travel… more
    CACI International (12/17/25)
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  • System Administrator

    TekSynap (Arlington, VA)
    …**WORK AUTHORIZATION/SECURITY CLEARANCE** USCitizenship **Clearance requir** **eme** **nt** :Active ** Secret clearance** ( Top Secret /SAP preferred). **OTHER ... Active Secret clearance. **COMPETENCIES** + System provisioning & administration ( Linux /Windows) + CNCF ecosystem tools & cloud-native environments + Patch &… more
    TekSynap (12/31/25)
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  • System Administrator

    Nightwing (Sterling, VA)
    …the intelligence community, defense, civil, and commercial markets. Job Title: System Administrator Location: Sterling, VA Clearance: TS /SCI Poly **This position ... is CONTINGENT upon contract award** The System Administrator (SysA) as part of the Platform Team delivers...customers in a timely manner. Required Skills: + Operating Systems : Extensive knowledge of Windows and Linux more
    Nightwing (12/26/25)
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