• Senior High Performance Computing (HPC)…

    BAE Systems (Annapolis Junction, MD)
    **Job Description** At BAE Systems , we promote a strong, collaborative culture and provide our employees with the tools, skills and training they need to succeed. We ... you performing at your best. We are seeking HPC Systems Administrators to: + Support a large client-server based...based IT enterprise in installation, configuration, and networking of Linux and Windows based platforms. + Oversee servers running… more
    BAE Systems (09/09/25)
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  • Sr. Principal System Administrator

    RTX Corporation (Plano, TX)
    …required, as only US citizens are eligible for a security clearance​ **Security Clearance:** Top Secret - Current At Raytheon, the foundation of everything we do ... problems. **What You Will Do: ** + Provide IT systems administration in a heterogeneous Microsoft Windows...+ Must have active and transferable US government issued Top Secret security clearance is required prior… more
    RTX Corporation (09/09/25)
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  • Sr. Specialist Cyber Infrastructure Engineer

    L3Harris (Carlsbad, CA)
    …by holding a current Secret clearance with the ability to obtain Top Secret post-hire Qualifications: + Bachelor's degree in Computer Science, Information ... clearance required; ability to obtain and maintain a Top Secret / SCI clearance post-hire. Preferred...IT and security experience, with a proven record in systems administration , cybersecurity engineering, and secure infrastructure… more
    L3Harris (09/25/25)
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  • Senior System Administrator (MSO)

    General Dynamics Information Technology (Livermore, CA)
    …**Type of Requisition:** Regular **Clearance Level Must Be Able to Obtain:** Top Secret /SCI **Public Trust/Other Required:** None **Job Family:** IT ... years of directly related experience in IT / Network administration and support. + TS /SCI or DoE...Compliant Certifications are required **Desired Qualifications** + Experience with Linux and Windows system administration and networking… more
    General Dynamics Information Technology (09/20/25)
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  • Senior Systems Administrator

    Exeter Government Services, LLC (Miami, FL)
    SCITES - Senior System Administrator Location: Doral, FL Required Clearance: TS or Secret w/SSBI (Tier 5 Investigation) Certifications: DoDM 8570 IAT Level II ... procedures + Follow Authorized Service Interruptions procedures when appropriate Required Qualifications: + TS or Secret w/SSBI (Tier 5 Investigation) + DoD 8570… more
    Exeter Government Services, LLC (09/07/25)
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  • Systems Engineer

    SOS International LLC (Pearl Harbor, HI)
    …updates via a Weekly Activity Report (WAR). **Minimum Requirements** + An Active in-scope TOP SECRET clearance with SCI Eligibility and US Passport. + Bachelors ... in support of existing Enterprise capabilities. + Provide mentorship for Systems Operations personnel in administration principles and best practices.… more
    SOS International LLC (09/24/25)
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  • Senior ADC Engineer, Platform Engineering…

    Amazon (Arlington, VA)
    …Practitioner) - 6+ years of Linux experience - 6+ years of systems engineering/ administration automation experience - 5+ years of Agile methods and processes ... candidate selected must currently possess and maintain an active TS /SCI security clearance with polygraph. The position further requires...systems on a massive scale, and to gain top -notch experience in cloud computing. You'll be surrounded by… more
    Amazon (09/09/25)
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  • Senior Cyber Security Engineer (Onsite)

    RTX Corporation (Largo, FL)
    …(vSphere, vCenter, ESXi) and overall virtualization implementations and a solid background in Systems Administration using Linux and Windows desktop and ... are eligible for a security clearance​ **Security Clearance:** DoD Clearance: TS /SCI Raytheon Company, Managed By Collins Aerospace. Collins Aerospace, an RTX… more
    RTX Corporation (09/09/25)
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  • IT Systems Administrator

    Leidos (Washington, DC)
    …planning sessions, providing actionable recommendations. **Required Security Clearance:** + Active Top Secret . **Basic Qualifications.** + Bachelor's degree and ... with Linux , UNIX, and AIX environments, with strong command-line administration and troubleshooting abilities. + Working knowledge of Oracle databases, Java… more
    Leidos (09/13/25)
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  • Mid System Administrator

    Parsons Corporation (Quantico, VA)
    …managing Windows and Azure server environments **Security Clearance Requirement:** An active Top Secret SCI w/Polygraph security clearance is required for this ... disk usage, and response times to maintain operating efficiency. + Performs systems security administration functions, including creating user profiles and… more
    Parsons Corporation (08/16/25)
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