• Senior Linux System Admin

    Citigroup (Irving, TX)
    …Overview** **:** We are seeking an accomplished and technically astute Level 3 Linux System Administrator to join our high-performance infrastructure team. This ... individual will serve as a subject matter expert (SME) on Linux systems, providing deep operational insight, advanced troubleshooting, performance tuning and… more
    Citigroup (09/23/25)
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  • Sr . Specialist Cyber Infrastructure…

    L3Harris (Carlsbad, CA)
    …ability to analyze outputs and drive remediation. + Extensive background as a Linux System Administrator in secure, classified environments, with expertise in ... sea and cyber domains in the interest of national security. Job Title: Sr . Specialist, Cyber Infrastructure Engineer Job Code: 29132 Job Location: Carlsbad, CA Job… more
    L3Harris (09/25/25)
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  • Senior Systems Administrator

    Leidos (Vienna, VA)
    **Description** The National Security Sector at Leidos is seeking a ** Senior System Administrator ** to join a dynamic team based in **Tysons Corner, VA** . This ... GitLab, Ansible, Kubernetes, OpenShift, and/or Docker + **Certifications:Microsoft Certifications,Cisco Network Certifications, Linux Certifications,AWS Certifications, Geospatial certifications** Come… more
    Leidos (07/29/25)
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  • Systems Administrator , Senior

    BOOZ, ALLEN & HAMILTON, INC. (Fort Meade, MD)
    …may not be readily available in production environments + Experience as a network administrator or systems engineer + Experience with Assured Compliant ... Systems Administrator , Senior The Opportunity: Are you...mentor and supervise team members. You'll support Windows and Linux systems engineering efforts in system design and evaluation,… more
    BOOZ, ALLEN & HAMILTON, INC. (10/08/25)
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  • Senior Systems Administrator

    SMX (Patuxent River, MD)
    Senior Systems Administrator (4521)at SMX(View all jobs) (https://www.smxtech.com/careers/) Patuxent River, MD SMX is looking for a highly motivated ** Senior ... Patuxent River NAS in southern Maryland. As the Systems Administrator , you will join a team of highly-driven, supportive,...+ Install, configure, and support an organization's local area network (LAN), wide area network (WAN), and… more
    SMX (10/09/25)
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  • Senior System Administrator

    Fiserv (Overland Park, KS)
    …impact on a global scale, come make a difference at Fiserv. **Job Title** Senior System Administrator **What does a successful Senior Information Technology ... Systems Administrator do?** At Fiserv, a Senior Information Technology Systems Administrator ensures the...**What you will do:** + Monitor, maintain, and optimize Linux and Windows servers and network infrastructure.… more
    Fiserv (10/09/25)
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  • Principal/ Sr . Principal Engineer…

    Northrop Grumman (Rome, NY)
    …within 60 days of start date. + Expertise with infrastructure components, including network , storage, Linux /Windows, and IT security concepts + Strong technical ... within 60 days of start date. + Expertise with infrastructure components, including network , storage, Linux /Windows, and IT security concepts + Strong technical… more
    Northrop Grumman (10/16/25)
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  • Sr Engineer, Computer Systems - IT…

    Guthrie (Sayre, PA)
    …for clinical systems, patient care services, and administrative functions across the network . The Sr . Engineer collaborates with IT teams, vendors, and ... Sayre, PA at least once a month. Summary: The Sr . Engineer, Compute System Engineering is responsible for the...ESX and Microsoft Hyper-V. + Expertise in Microsoft Windows, Linux and AIX operating systems and management. + Familiar… more
    Guthrie (09/22/25)
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  • Senior Systems Administrator

    CACI International (Annapolis Junction, MD)
    …Type of Travel: Local * * * **The Opportunity:** **CACI** is seeking a ** Senior Linux Systems Administrator ** to provide support for implementation, ... Senior Systems Administrator Job Category: Information...Administrator Associate. One of the following certifications: A+, Network +, or System Security Certified Practitioner (SSCP). + A… more
    CACI International (09/25/25)
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  • Sr . Principal Storage & Data Protection…

    RTX Corporation (Woburn, MA)
    …and create end-of-end solutions to solve complex DT infrastructure problems. As a ** Senior Principal level System Administrator ,** this role will require a ... solves tough, meaningful problems that create a safer, more secure world. ** Sr . Principal Storage & Data Protection System Administrators** collaborate with a… more
    RTX Corporation (08/29/25)
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