• Systems Administrator

    ManTech (San Antonio, TX)
    **ManTech** seeks an experienced and passionate, career and customer-oriented **System Administrator ** to join our team located in the **San Antonio, TX** area. ... environments (VMWare ESX, VCenter Administration) + Experience in administration of Linux + Experience configuring and maintaining storage and file systems (NFS,… more
    ManTech (09/11/25)
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  • Network Support Technician - Senior…

    General Dynamics Information Technology (Killeen, TX)
    …10 + years of related experience **US Citizenship Required:** Yes **Job Description:** ** Network Support Technician - Senior - TS/SCI required** Make meaningful ... of the most complex government, defense, and intelligence projects. Join GDIT as a ** Network Support Technician - Senior ** with for a career where your growth… more
    General Dynamics Information Technology (09/16/25)
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  • Senior Network and Next Generation…

    Lumen (Austin, TX)
    …that have company-wide and possibly industry-wide impacts. + Frequent contact with senior leadership of customers and contractors for the purpose of creating and ... Event Manager) application is desired - ArcSight or Splunk administrator experience/exposure is a plus. Ability to develop and...analysis via SIEM or vendor application is desired. + Linux RedHat Server Administration is considered a plus. +… more
    Lumen (10/01/25)
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  • Systems Engineer Senior - Level 3

    Lockheed Martin (Fort Worth, TX)
    …virtual servers * Upgrading system hardware and startup/shutdown of rack components * Network administrator experience with experience in Layer 2 and 3 ... **Description:** You will be the Systems Engineer Senior for the F\-35 Mission Planning Environment \(MPE\)...and issues * Lab configuration consisting of installation of Linux and Windows operating systems in a variety of… more
    Lockheed Martin (07/26/25)
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  • Information System Security Engineer…

    Amentum (San Antonio, TX)
    …is a DoD-provided, TS/SCI, integrated voice, video, and data, global communications network that facilitates collaboration among senior leaders and key staff. ... Amentum is seeking an Information System Security Engineer - Senior to join our team of passionate individuals in...to support, operate, and maintain the Distributed Continuity Integrated Network - Top Secret Enterprise Services (DCIN-TS ES) which… more
    Amentum (08/29/25)
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  • Senior Information Security System Engineer…

    Citigroup (Irving, TX)
    …growth and progress together. The Info Sec Tech Lead Analyst is a senior level professional position responsible for driving efforts to prevent, monitor and respond ... and document issues. + Maintain strategic security strategies incorporating Linux , networking, compliance, and security best practices. + Support enterprise-scale… more
    Citigroup (08/23/25)
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  • Senior Storage Engineer

    CGI Technologies and Solutions, Inc. (Belton, TX)
    ** Senior Storage Engineer** **Category:** Infrastructure/Cloud **Main location:** United States, Tennessee, Knoxville **Alternate Location(s):** United States, ... **Position Description:** Our Northwest Business Unit is seeking a senior storage engineer must be able to work in...Party Applications & Tools, SAN, NAS, EMC, Cisco, Nexus, Linux , Windows, VMWare, and other systems * Performing complex… more
    CGI Technologies and Solutions, Inc. (08/08/25)
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  • Senior Lead Cloud Security Threat Modeler

    Citigroup (Irving, TX)
    …, **logging/monitoring** , **encryption** , **infrastructure security** , and ** network segmentation** . + Mastery of **Operating Systems** (eg, **Windows** ... , ** Linux ** ) and their hardening best practices. + Strong...or performing **Penetration Testing** activities (eg, **vulnerability scanning** , ** network penetration testing** , **web application testing** , **mobile… more
    Citigroup (09/18/25)
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  • Cloud Security Threat Modeler Senior…

    Citigroup (Irving, TX)
    …, **L** **ogging/Monitoring** , **Encryption** , **Infrastructure Security** , and ** Network Segmentation** . + Experience with scripting languages (eg, **Python** , ... frameworks. + Working knowledge of **Operating Systems** (eg, **Windows** , ** Linux ** ) and their hardening best practices. + Familiarity with **Development… more
    Citigroup (09/23/25)
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  • Engineer II, Cloud

    CARMAX (Plano, TX)
    …our innovation is new digital products. We are seeking a motivated and detail-oriented Linux Systems Engineer to join our Enterprise Systems team. This role is ideal ... for individuals with foundational experience in Red Hat Linux administration, Ansible automation, and Red Hat Satellite platform management. The successful candidate… more
    CARMAX (08/08/25)
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