• Sr. Principal Linux Systems…

    RTX Corporation (El Segundo, CA)
    …for a security clearance​ **Security Clearance:** TS/SCI with Polygraph **Sr. Principal Linux Systems Administrator - El Segundo, CA -Must have a TS/SCI with CI ... create a safer, more secure world. **Sr Principal System Administrator ** in infrastructure Workplace Services, collaborate with a many...We Prefer** : + Experience with Ansible. + Experience Unix / Solaris 11. + VMware expertise desired. +… more
    RTX Corporation (08/01/25)
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  • Tier 2 Systems Administrator

    CACI International (Springfield, VA)
    Tier 2 Systems Administrator Job Category: Information Technology Time Type: Full time Minimum Clearance Required to Start: TS/SCI with Polygraph Employee Type: ... are seeking a skilled and motivated Tier 2 System Administrator to join our growing IT team. In this...be responsible for maintaining and troubleshooting mission critical IT systems , supporting end users, and ensuring the security and… more
    CACI International (06/06/25)
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  • Systems Administrator (Active TS/SCI…

    World Wide Technology (Albuquerque, NM)
    …Ability to create and modify scripts in multiple disciplines on Windows, Linux, and Solaris systems * Knowledge of the Customer's processes and procedures and of ... of hire* TS/SCI Clearance required and eligibility to obtain CI Poly* UNIX , Windows, and/or Storage administration* Experience working with trouble reporting and… more
    World Wide Technology (07/24/25)
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  • Principal System Administrator

    DCCA (Annapolis Junction, MD)
    Principal System Administrator Location Annapolis Junction, MD Job Code 2270 # of Openings 1 Apply Now ... compensation and benefits package. Visit our website at: www.dcca.com Principal System Administrator Candidate must have an active TS/SCI w/Poly For over 40 years,… more
    DCCA (05/19/25)
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  • Senior System Administrator (Linux)

    TISTA Science and Technology (Austin, TX)
    Overview TISTA is looking for a Senior Systems Administrator to manage teams, prioritize work, and handle critical problems. You'll provide patching support, ... oversee provisioning, configuration management, and system monitoring on Linux systems and servers. You'll also assist with the installation...Must have Mastery knowledge in Red Hat, Linux and Solaris Unix OS's, must be capable working… more
    TISTA Science and Technology (05/29/25)
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  • Linux System Administrator

    ManTech (Aurora, CO)
    …issues at Tier 1 and Tier 2 support levels + Configure and manage UNIX /Linux operating systems and install/load OS software + Optimize system operations and ... Security+ certification + Experience with troubleshooting and maintaining enterprise IT systems + Experience managing and optimizing UNIX /Linux environments… more
    ManTech (08/08/25)
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  • Linux System Administrator

    ManTech (Aurora, CO)
    …issues at Tier 1 and Tier 2 support levels + Configure and manage UNIX /Linux operating systems and install/load OS software + Optimize system operations and ... required + Experience with troubleshooting and maintaining enterprise IT systems + Experience managing and optimizing UNIX /Linux...all of the following technologies and environments: + Operating Systems : CentOS, AIX, Solaris , RHEL + Tools… more
    ManTech (08/08/25)
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  • High Performance Computing (HPC) System…

    RTX Corporation (Tucson, AZ)
    …or Top-Secret Clearance. + Advanced hands-on experience with Windows and Unix security hardening, systems integrations, advanced troubleshooting, and ... authentication service integration (LDAP). + Unix (Including Linux and Solaris ), experience in a medium to high complex environment(s). + Working knowledge of… more
    RTX Corporation (07/13/25)
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  • Linux/Windows System Administrator

    Lockheed Martin (Moorestown, NJ)
    …experience supporting UNIX based users on a LAN, including operating systems \- Excellent interpersonal and teamwork skills required\. \- Ability to support ... computer system problems and improving performance on the following platforms/operating systems : Solaris , Linux RedHat & RedHawk, Concurrent PowerMax, HP\-UX… more
    Lockheed Martin (07/12/25)
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  • Systems Engineer w/ TS/SCI

    General Dynamics Information Technology (Livermore, CA)
    …all of the client server and network devices. + Provide engineering support for the systems administrator for systems issues that have been escalated and ... tools + Create and modify scripts in multiple disciplines on Windows, Linux, and Solaris Systems + Liaise with vendors and other IT personnel for problem… more
    General Dynamics Information Technology (07/16/25)
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