• Applied Research Associates, Inc. (Warrendale, PA)
    …years 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...at least five (5) years of experience in a senior Linux Systems Administrator role… more
    DirectEmployers Association (10/23/25)
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  • MCL Systems Limited (Manassas, VA)
    …system, database infrastructure. Our infrastructure is a multi-site network cluster of Windows , Linux servers, SQL Server databases, and other supporting network ... System, Network, and Database Administrator Our Company MCL Systems Limited ( MCL...Systems Center (SCCM, SCVMM, SCOM) - PowerShell Programming - Windows Servers, Virtual Desktops Linux servers, Microsoft… more
    job goal (12/08/25)
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  • Schrdinger (NY)
    …+ Administer and maintain a diverse fleet of endpoints and servers (macOS, Windows , and Linux ), including provisioning, patching, and configuration management + ... We're seeking a **Systems Administrator ** to join us in our mission to...Proven experience administering mixed-OS environments, with specific proficiency in Linux (RHEL/Ubuntu) and Windows Server + Robust… more
    DirectEmployers Association (12/03/25)
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  • Infinity Systems Engineering (Alexandria, VA)
    …and troubleshoot Juniper and Cisco switches. + Perform systems administration on Windows and Linux platforms (updates, security, troubleshooting, management). + ... us! Job Summary: We are seeking a skilled Systems Administrator /Network Engineer to join our mission-driven team. This position...configuration (Cisco experience is a plus) + Proficient in Linux and Windows system administration + Active… more
    DirectEmployers Association (12/03/25)
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  • Tyto Athene (Ashburn, VA)
    …environments as an applications or systems administrator . + Practical knowledge of Windows and Linux systems administration. + Experience with Linux or ... Administer and optimize enterprise IT applications and systems in Windows and Linux environments. + This role...on Amazon Web Services (AWS). + Serve as a senior Splunk Administrator or Architect, responsible for… more
    DirectEmployers Association (11/01/25)
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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, ... Puppet) to automate repetitive tasks, configuration baselines, and deployment pipelines across both Windows and Linux environments. + Lead efforts to integrate … more
    ManTech (11/05/25)
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  • Senior Systems Administrator

    Mount Sinai Health System (New York, NY)
    …Mount Sinai. The Administrator is the principal technology expert for Windows and Linux systems, and help support high-performance computing (HPC) ... practices. + At least 6 years of experience in designing, administering and troubleshooting Linux and Windows systems, storage systems, network and VMs. + The… more
    Mount Sinai Health System (09/22/25)
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  • Senior Systems Administrator

    Alaka'ina Foundation Family of Companies (Kauai County, HI)
    …The Alaka`ina Foundation Family of Companies (FOCs) is looking for a Senior Linux Systems Administrator Range Network. The position ... Senior Systems Administrator ( Linux )... Senior Systems Administrator ( Linux ) Location HI - Kaua'i...AND EXPERIENCE: + Advanced knowledge and certification in both Windows Server and RHEL is considered highly desired. +… more
    Alaka'ina Foundation Family of Companies (11/20/25)
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  • Senior Systems Administrator

    Amentum (Waimea, HI)
    Amentum is seeking a highly experienced Senior Linux System Administrator to oversee and manage enterprise-level Linux infrastructure in support of US ... QALUIFICATIONS Experience: + Advance knowledge and certification in both Windows Server and RHEL is considered highly desired +...following OS Certifications required + Linux + Linux + Red Hat Certified System Administrator (RHCSA)… more
    Amentum (09/24/25)
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  • Senior Linux System…

    BAE Systems (San Diego, CA)
    …Other incentives may be available based on position level and/or job specifics. ** Senior Linux System Administrator ** **116453BR** EEO Career Site Equal ... career with BAE Systems. BAE Systems is seeking a Senior Closed Area Linux Systems Administrator...after-hours or weekend support may be required for maintenance windows or incident response. You must be able to… more
    BAE Systems (09/18/25)
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  • Senior Linux Systems…

    Leidos (Aurora, CO)
    **Description** **Leidos** has a new and exciting opportunity for a ** Senior Linux Systems Administrator ** in our **National Security Sector's (NSS) Cyber & ... difference in National** **Security!** Join our team as a ** Linux Systems Administrator ** , where you'll provide...to 15 years. + **Technical Skills** : Experience with LINUX , Windows and Virtualization + **Security Clearance**… more
    Leidos (10/09/25)
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  • Systems Administrator II Generalist Sr…

    V2X (Springfield, VA)
    …respect, responsibility, and professionalism. We are hiring a Senior Systems Administrator II Generalist - Windows Server - active TS/SCI clearance to ... Microsoft Windows Server platforms, but there are also Linux distributions as well. + The Senior Systems Administrator II shall support the mid-level… more
    V2X (11/15/25)
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  • Senior Principal Linux

    RTX Corporation (El Segundo, CA)
    …more secure world. **What You Will Do** + We are seeking an experienced Linux Administrator that will be working in a highly collaborative, multi-platform and ... operation, and maintenance of systems hardware and software related to a Linux / Windows infrastructure for classified programs. Duties include, but are not… more
    RTX Corporation (09/26/25)
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  • Senior Linux System…

    Black Bear Technology Solutions, LLC (Adelphi, MD)
    Senior Linux System Administrator ...DoD 8750 and 8140 compliance requirements Technical Environment: + Windows Server + MCEM + MAC OS + RHEL, ... or Secret Clearance Locations: Adelphi, MD (Onsite) Position Overview: The Senior Linux System Administrator is responsible for leading system administration… more
    Black Bear Technology Solutions, LLC (11/21/25)
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  • Senior / Principal Windows System…

    SciTec (Boulder, CO)
    …requirements will not be considered. SciTec has an immediate opportunity for a talented Senior / Principal Windows System Administrator to join our team ... Windows systems administration in multiple heterogeneous Microsoft Windows and Red Hat Enterprise Linux environments...+ 5+ years professional experience performing duties of a Windows system administrator + Strong knowledge of… more
    SciTec (11/19/25)
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  • (Mid. or Senior ) Networking Systems…

    Belay Technologies (Annapolis Junction, MD)
    …2020 and a finalist in 2021! Belay Technologies is seeking a Network Systems Administrator ( Windows ) to join our team. The selected individual will be ... that utilizes complex equipment/systems (ex. Network Switches, Routers, LANs, & cabling, Windows / Linux operating systems, VMware, etc.). + Must have experience… more
    Belay Technologies (10/01/25)
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  • Senior Linux System…

    ManTech (Fort Meade, MD)
    ManTech seeks a ** Senior Linux System Administrator ** to join our team in **Ft. Meade, MD** . In this role, you will provide support for implementation, ... perform capacity analysis and system planning. + Configure and manage Linux and Windows operating systems; install, load, and enhance OS software for improved… more
    ManTech (10/14/25)
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  • Linux / AWS Systems Administrator

    Northrop Grumman (Morrisville, NC)
    …**Responsibilities will include but not be limited to the following:** + Serve as a senior Linux Systems Administrator within an AWS cloud environment for a ... Northrop Grumman Classified Solutions team is seeking an experienced ** Linux Systems Administrator ** to join its dynamic...writing. + DoD 8570 Certification in a primary OS ( Windows , Linux , Cisco). We offer flexible work… more
    Northrop Grumman (11/15/25)
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  • Linux Systems Administrator

    L3Harris (Greenville, TX)
    …land, sea and cyber domains in the interest of national security. Job Title: Linux System Administrator Job Code: 29921 Job Location: Greenville, TX Schedule: ... 9/80 Job Description: L3Harris is seeking a Linux Systems Administrator to support Mission System...with a team of multidiscipline, multileveled Systems Administrators supporting Linux , Windows , and Network operations + … more
    L3Harris (12/10/25)
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  • System Administrator - Linux

    Leidos (Annapolis Junction, MD)
    **Description** **System Administrator - Linux ** **Leidos** has a new and exciting opportunity for a **System Administrator - Linux ** in our **National ... that utilizes complex equipment/systems (ex. Network Switches, Routers, LANs, & cabling, Windows / Linux operating systems, VMware, etc.). + Must have experience… more
    Leidos (11/19/25)
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