• Senior Systems Administrator

    RTX Corporation (Tucson, AZ)
    …create a safer, more secure world. **What You Will Do** : + Provide IT systems administration in a heterogeneous Microsoft Windows and Redhat Enterprise Linux ... environment. + Experience with Windows Server internals or Linux fundamentals to include DNS, DHCP, AD, and server...complexity to include the integration of hardware and operating systems (OS). + Must be able to obtain Department… more
    RTX Corporation (11/13/25)
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  • Senior Information Systems Security…

    Leidos (Fort Meade, MD)
    …and coordinates cross-discipline resolutions via CCBs and design reviews. + Experienced in Linux /Windows system administration , RF system configuration, ... **Description** **Leidos** has a new and exciting opportunity for a Senior Information Systems Security Officer (ISSO) in our **National Security Sector's (NSS)… more
    Leidos (10/16/25)
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  • Senior Associate, Info Security…

    L3Harris (Broomfield, CO)
    …sea and cyber domains in the interest of national security. Job Title: Senior Associate, Information Security Systems Engineer Job Code: 31042 Job Location: ... and technologies to the architecture, design, development, evaluation and integration of systems and networks to maintain system security. Works closely with… more
    L3Harris (11/12/25)
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  • Senior Cloud Systems Engineer…

    St. George Tanaq Corporation (Suitland, MD)
    …Cloud Platform (GCP), Oracle Cloud Infrastructure (OCI) Operating Systems : Linux /Unix (Ubuntu, CentOS, Red Hat) Windows Server administration Infrastructure ... Senior Cloud Systems Engineer (Identity Management...Azure ExpressRoute, and software-defined networking (SDN) solutions. + Analyze system requirements and ensure that systems will… more
    St. George Tanaq Corporation (11/18/25)
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  • Systems Engineer, Senior

    CymSTAR LLC (Tulsa, OK)
    …in C, FORTRAN, and/or other high order languages. Utilization of the Linux Operating System . + Perform implementation, integration, and acceptance test ... tools such as GIT and Subversion. Usage of Microsoft Windows and Linux Operating Systems . Understanding of computer networking concepts. Proficiency with… more
    CymSTAR LLC (11/04/25)
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  • Senior / Principal Windows System

    SciTec (Boulder, CO)
    …and a clear focus on supporting customer needs. Responsibilities + Provide Windows systems administration in multiple heterogeneous Microsoft Windows and Red Hat ... considered. SciTec has an immediate opportunity for a talented Senior / Principal Windows System Administrator to...and maintain security policies and procedures to protect Windows systems and data. + Monitor system performance… more
    SciTec (11/19/25)
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  • Senior Information Systems Security…

    RTX Corporation (Aurora, CO)
    …that create a safer, more secure world. Our cybersecurity team is seeking a ** Senior ** **Information Systems Security Officer (ISSO) II** to support our team ... You Will Do** + Cybersecurity sustainment activities (hardware change administration , software change administration , account overseeing, media protection,… more
    RTX Corporation (11/12/25)
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  • Senior Systems Engineer

    SOLUTE Careers (Pope, MS)
    Sigma Defense is seeking a Senior Systems Engineer willing to tackle complex technical issues in a collaborative environment. Supporting the organization to ... Experience creating design documents and diagrams to support the system design. + Skilled in documenting all build and...+ Troubleshoot and resolve infrastructure issues on Windows and Linux systems for services such as Active… more
    SOLUTE Careers (09/26/25)
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  • Senior Associate Systems Operations…

    NTT America, Inc. (Remote, OR)
    …operate virtualized environments to support virtualized systems (Windows and Linux ) + Perform regular system maintenance, including software updates, ... as a Systems Administrator, with a focus on implementation, and administration . + Knowledge of systems , including servers, storage, and virtualization… more
    NTT America, Inc. (11/20/25)
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  • Systems Administrator - Senior

    CACI International (O'Fallon, IL)
    …financial auditability and transportation logistics? We're seeking a successful, experienced Senior Systems Administrators to join our team in implementing ... Systems Administrator - Senior Job Category:...of degree) + 8-11 years of extensive experience in system administration + Secret security clearance, or… more
    CACI International (11/08/25)
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