• COLSA Corporation (Huntsville, AL)
    Join our team as a Linux Systems Administrator , where you will support and manage a diverse mix of workstations, servers, and high-performance computing ... (SAP) eligibility and maintain program accesses as required + Strong experience with Linux system administration. + Ability to troubleshoot and resolve hardware… more
    DirectEmployers Association (10/02/25)
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  • Neya Systems (Warrendale, PA)
    …of relevant experience, with at least five (5) years of experience in a senior Linux Systems Administrator role, preferably in a high-tech or regulated ... join our team. This successful person will manage our Linux -based infrastructure and our Windows -11 developer fleet...least five (5) years of experience in a senior Linux Systems Administrator role Equal… more
    DirectEmployers Association (10/23/25)
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  • Infinity Systems Engineering (Colorado Springs, CO)
    …WE ARE MORE - now, come be more with us! Job Summary: The Systems Administrator is responsible for the maintenance, configuration, and reliable operation of ... security, and providing technical support to internal users. The Systems Administrator will work closely with the...setup. + Experience or familiarity with Red Hat Enterprise Linux integration with Windows authentication services (Active… more
    DirectEmployers Association (12/05/25)
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  • Tyto Athene (Santa Barbara, CA)
    **Description** Tyto Athene is searching for a ** Systems Administrator /Information System Security Officer** to join our CA team. **Responsibilities:** + ... administration of Windows -based computers, networks, and server administration, Linux system and server administration. + Research, generate, and validate… more
    DirectEmployers Association (12/06/25)
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  • Schrdinger (NY)
    We're seeking a ** Systems Administrator ** to join us in our mission to improve human health and quality of life! At Schrodinger, we're dedicated to advancing ... + Administer and maintain a diverse fleet of endpoints and servers (macOS, Windows , and Linux ), including provisioning, patching, and configuration management +… more
    DirectEmployers Association (12/03/25)
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  • Argonne National Laboratory (Lemont, IL)
    Argonne has an opportunity to serve as the System Administrator of the classified National Security Systems (NSS) for the Security Programs Facility (SPF). ... software upgrades. + Experience with the administration of common Windows Server Domain Services such as Active Directory, DNS,...Veeam, or similar enterprise backup solutions. + Familiarity with Linux Server Operating Systems such as RHEL,… more
    DirectEmployers Association (11/22/25)
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  • Applied Research Associates, Inc. (Eglin AFB, FL)
    …required for secure SIPRNet operations. This role works directly with the Sr. Systems Administrator and the broader systems -admin team leading engineering ... Applied Research Associates, Inc. ( **ARA** ) is seeking a lead administrator for a SIPRNet capability supporting a DoD-owned secret-level enclave that already… more
    DirectEmployers Association (11/21/25)
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  • PSEG Long Island (Bethpage, NY)
    …and overall health of a variety of cyber security tools within a Microsoft Windows , Linux and UNIX server environments. This role will manage and support ... application development techniques. + Working knowledge and experience in supporting Microsoft Windows Server Operating Systems , Directory Services (AD), MS PKI… more
    DirectEmployers Association (11/06/25)
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  • Infinity Systems Engineering (Alexandria, VA)
    …experience in Juniper switch configuration (Cisco experience is a plus) + Proficient in Linux and Windows system administration + Active CompTIA Security+ CE ... with us! Job Summary: We are seeking a skilled Systems Administrator /Network Engineer to join our mission-driven...secure, and troubleshoot Juniper and Cisco switches. + Perform systems administration on Windows and Linux more
    DirectEmployers Association (11/25/25)
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  • Tyto Athene (Ashburn, VA)
    …as an applications or systems administrator . + Practical knowledge of Windows and Linux systems administration. + Experience with Linux ... . + Administer and optimize enterprise IT applications and systems in Windows and Linux ...Web Services (AWS). + Serve as a senior Splunk Administrator or Architect, responsible for the configuration, maintenance, and… more
    DirectEmployers Association (11/01/25)
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  • Tyto Athene (Reston, VA)
    …10+ years of experience with: **Core infrastructure operations:** Windows / Linux , virtualization, storage, backups, and disaster recovery-standardized ... mission cyber considerations + Serve as Technical Lead and administrator for TALON Data Center and TALON lab IT...via infrastructure-as-code and live dashboards. + HPC cluster system administration, preferably in rapid AI and cyber solution… more
    DirectEmployers Association (12/13/25)
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  • Linux / Windows Systems

    COMSO, Inc (Columbia, MD)
    Linux / Windows Systems Administrator ...Certification, IA Baseline Certification in Linux , Unix, Windows , or Cisco OS operating system + One ... (1) year experience in Linux , Unix, Windows , or Cisco OS operating system (...Service, TIBCO, Active MQ, Artemis, Kafka) Description: + The System Administrator is responsible for the provisioning,… more
    COMSO, Inc (11/27/25)
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  • Senior Systems Administrator

    ManTech (Fairmont, WV)
    **MANTECH** seeks a motivated and customer-oriented **Senior Systems Administrator - Windows / Linux Dual-Stack Specialist** to join our team in **Boulder, ... experience in Systems Administration, with demonstrated expertise in both Windows Server and Enterprise Linux environments. + Expert-level, hands-on… more
    ManTech (11/05/25)
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  • Associate Linux and Windows

    The Boeing Company (Tukwila, WA)
    …States (US) Infrastructure Organization is currently seeking an **Associate Linux and Windows Systems Administrator ** to join the team in **Tukwila, WA** ... + 1+ years of experience in performing system administration tasks on Windows and Linux hosts including installing security patches and making configuration… more
    The Boeing Company (12/19/25)
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  • Linux / Windows Systems

    Lockheed Martin (King Of Prussia, PA)
    system administration, including installing, patching, troubleshooting and hardening Linux and Windows operating systems \(both bare\-metal and ... have an active Top Secret Clearance **Desired Skills:** * Windows and Linux OS patching/security hardening in...* CompTIA Linux \+ or Red Hat Certified Systems Administrator Certification * Ability to provide… more
    Lockheed Martin (12/11/25)
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  • Senior Systems Administrator

    Mount Sinai Health System (New York, NY)
    …at Mount Sinai. The Administrator is the principal technology expert for Windows and Linux systems , and help support high-performance computing (HPC) ... team and a research data services team. The **_Senior Systems Administrator /Engineer,_** as a member of the...6 years of experience in designing, administering and troubleshooting Linux and Windows systems , storage… more
    Mount Sinai Health System (09/22/25)
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  • Linux / Windows Senior…

    Lockheed Martin (San Diego, CA)
    System Administration \- Experience with server and desktop management of Linux and Windows environments \- Familiar with package deployment, imaging, ... Martin is looking for highly motivated, experienced individuals to perform network/ system administration and support on a variety of complex platforms supporting… more
    Lockheed Martin (12/18/25)
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  • Principal System Administrator

    RTX Corporation (El Segundo, CA)
    …Do** : + Provide IT systems administration in a heterogeneous Microsoft Windows and Red Hat Enterprise Linux environment. + Understanding and knowledge of ... technology solutions to prevent security threats, secure the integrity of our systems and support IT infrastructures around the world. **Sr. Principal System more
    RTX Corporation (12/09/25)
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  • Systems Administrator Level 2

    Northrop Grumman (Aurora, CO)
    …but not be limited to, the following:** + Perform as a Linux and Windows System Administrator on large government contracts. + Perform administration on ... part of our mission. Northrop Grumman is seeking a ** Systems Administrator ** **Level 2** to join our...server administration experience with Linux (RedHat Enterprise Linux is preferred) and Windows + Perform… more
    Northrop Grumman (10/22/25)
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  • Systems Administrator (Level 2 or 3)

    Northrop Grumman (Aurora, CO)
    …is located in **Aurora, CO.** **Job Duties:** + Perform as a Linux and Windows System Administrator and able to build these environments from scratch. + ... Space Systems (NGSP) seeks to fill a ** Systems Administrator (Level 2 or 3)** supporting...of application.** + Must have server administration experience with Linux RHEL 7x - 9x and Windows more
    Northrop Grumman (11/06/25)
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