• Senior Lead Cloud Security Threat Modeler

    Citigroup (Irving, TX)
    …, **infrastructure security** , and ** network segmentation** . + Mastery of ** Operating Systems ** (eg, **Windows** , **Linux** ) and their hardening best ... and specify mitigating controls which will directly reduce the risk of Citi operating in the public cloud. **Responsibilities:** + Threat Modeling using a documented… more
    Citigroup (09/18/25)
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  • Senior Controls Engineer

    Hawaiian Electric (Honolulu, HI)
    …the Generation control systems . Maintains all process monitoring and control systems related to power generation. + Performs network administrator functions ... and extension of the capabilities of the Operational Technology (OT) Control Systems . Provides hands-on and supervisory support to meet corporate goals in service… more
    Hawaiian Electric (08/23/25)
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  • Service Center Frontline Account Manager

    CACI International (Chantilly, VA)
    …appropriate technical teams. Analyze, troubleshoot, and resolve issues involving end-user systems , servers, storage, network connectivity, and security controls. ... as the first point of contact for a large, mission-critical government organization operating in a 24x7 environment. This role combines the responsibilities of a… more
    CACI International (09/30/25)
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  • Frontline Account Manager

    CACI International (Chantilly, VA)
    …technical teams. + Analyze, troubleshoot, and resolve issues involving end-user systems , servers, storage, network connectivity, and security controls. + ... as the first point of contact for a large, mission-critical government organization operating in a 24x7 environment. This role combines the responsibilities of a… more
    CACI International (08/20/25)
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  • Linux Engineer - TS/SCI with Polygraph

    General Dynamics Information Technology (Chantilly, VA)
    …CE, Systems Security Certified Practitioner (SSCP) or Cisco Certified Network Associate (CCNA)-Security. CompTIA Security+ CE Certification is the preferred ... possess an appropriate and current DoD Information Assurance (IA) Certification to be considered for employment; either valid CompTIA...to have related experience and knowledge/understanding of: + Linux Operating systems as a server or desktop… more
    General Dynamics Information Technology (09/16/25)
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  • Information Technology Specialist

    National Park Service (Washington, DC)
    …based on guidance developed at higher levels when multiple system issues and network systems are involved. Performs a variety of database management activities. ... must include all of the following: experience analyzing computer or network incidents following prescribed standard operating procedures; experience testing… more
    National Park Service (09/30/25)
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  • Information Technology/Assurance Specialist I

    P 11 Security, Inc. (Colorado Springs, CO)
    …Windows 2012R2 Server, Microsoft Exchange Server 2010/2016, Microsoft Windows 7/10 operating systems (OS) administration and associated hardware + Working ... system interfaces for computer system(s) assigned + Maintain file servers, Firewalls, network access, Security Monitoring Systems and system documentation as… more
    P 11 Security, Inc. (09/25/25)
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  • BOC Specialist 3 - Washington

    M. C. Dean (District Of Columbia, DC)
    …security, telecommunications, life safety, automation and controls, audio visual, and IT systems . MC Dean is headquartered in Tysons, Virginia, and employs more than ... engineer and deploy automated, secure, and resilient power and technology systems ; and deliver the management platforms essential for long-term system… more
    M. C. Dean (08/30/25)
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  • Unix & Linux System Administrator (Member…

    Lockheed Martin (Camden, NJ)
    …reliable, and mission\-ready\. **THE WORK** You will configure and manage Unix/Linux operating systems , install/load OS software, and build Linux workstations ... technical skills in Linux administration, including experience with Unix and Linux operating systems , scripting, and troubleshooting * Experience with the… more
    Lockheed Martin (08/22/25)
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  • Sr. Linux/Unix Administrator

    S4 Inc. (Omaha, NE)
    …for enterprise Linux/Unix OS solutions. + Install, configure, and maintain Linux/Unix OS operating systems . + Analyze and resolve problems associated with the ... + At least 8 years experience in installing, configuring, and maintaining Linux/Unix OS operating systems Ability to work both independently and in a team… more
    S4 Inc. (10/08/25)
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