• 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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  • Cloud System Administrator

    ManTech (Hanover, MD)
    …and on-premise contexts **Minimum Qualifications:** + 10+ years of experience as a Systems Administrator or Cloud Engineer supporting programs and contracts of ... for Windows Server 2022 environments, including Active Directory, and manage Windows 10/11 client systems . + Architect, deploy, and maintain robust cloud… more
    ManTech (12/24/25)
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  • System Administrator

    General Dynamics Information Technology (Annapolis Junction, MD)
    …RQ210156 **Type of Requisition:** Regular **Clearance Level Must Be Able to Obtain:** Top Secret SCI + Polygraph **Public Trust/Other Required:** None **Job ... involved in the resolution process. Configures and manages UNIX, Linux and Windows operating systems and installs/loads operating system software, troubleshoots,… more
    General Dynamics Information Technology (11/08/25)
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  • System Administrator 2

    M. C. Dean (Annapolis Junction, MD)
    …seeking a **System Administrator 2** to join our **Security and Electronic Systems (SES)** business Unit. As part of **(SES)** Strategic Business Unit you will ... to meet service level agreements. + Support configuration and management of Windows operating systems and install/load operating system software. + Perform… more
    M. C. Dean (11/05/25)
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  • Network System Administrator

    ManTech (Los Angeles, CA)
    …will include both air and ground transportation). **Clearance Requirements:** + Current Top - Secret Clearance with SCI Eligibility. + Eligibility for access to ... **MANTECH** seeks a motivated, career and customer-oriented **Network System Administrator ** **III** to join our team in **Los Angeles, CA.** The primary function is… more
    ManTech (12/17/25)
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  • System Administrator

    ProSphere Tek (Tacoma, WA)
    …environment to substantially improve your skills and experience? PSI is seeking a System Administrator with an active Top Secret /SCI clearance to support our ... Access, PowerPoint and SharePoint. + Working knowledge of operating systems : UNIX (Sun Solaris, SUNOS), LINUX, Microsoft Windows... systems : UNIX (Sun Solaris, SUNOS), LINUX, Microsoft Windows OS (current and legacy), Cisco OS, Juniper. +… more
    ProSphere Tek (10/31/25)
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  • System Administrator 1

    M. C. Dean (Annapolis Junction, MD)
    …seeking a **System Administrator 1** to join our **Security and Electronic Systems (SES)** business Unit. As part of **(SES)** Strategic Business Unit you will ... monitoring and reviewing system logs. + Support configuration and management of Windows operating systems and install/load operating system software. + Support… more
    M. C. Dean (11/05/25)
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  • Network Security Administrator

    TekSynap (Pensacola, FL)
    …Linux, Cisco) + IAT LVL III (eg, GIAC, CISSP, CASP, CISM) + Must have Top Secret clearance **COMPETENCIES** + Network Security & Architecture + Cybersecurity & ... **Responsibilities & Qualifications** The **Network Security Administrator ** is responsible fornetwork boundary protection, cybersecurity posture, and accreditation… more
    TekSynap (10/07/25)
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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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  • Cloud System Administrator

    ManTech (Annapolis Junction, MD)
    …maintain system solutions **Minimum Qualifications:** + 14+ years of experience as a Systems Administrator or Cloud Engineer supporting programs of similar scope ... MANTECH seeks a motivated, career- and customer-oriented **Cloud System Administrator ** to join our team in Hanover, MD. Our...and troubleshoot Linux (Amazon Linux 2023, RHEL 8/9) and Windows Server (2016/2022) systems . + Configure and… more
    ManTech (12/24/25)
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