• Penetration Tester 3

    ARSIEM (Annapolis Junction, MD)
    …the testing phase of security control assessments using specialized knowledge of network protocols, operating systems , architectures, equipment, services, ... (8) experience of related work experience as a Penetration Tester performing network and application-level testing using established test protocols and methods. + A… more
    ARSIEM (01/13/26)
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  • Modernization Cyber Systems Administrator…

    Lockheed Martin (Hanover, MD)
    …integrity of and configure network components, along with implementing operating systems enhancements to improve reliability and performance * Provide ... * Configure and manage UNIX and Windows \(or other applicable\) operating systems and installs/loads operating system software, troubleshoot, maintain… more
    Lockheed Martin (01/08/26)
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  • Cyber Defense Specialist

    MIT Lincoln Laboratory (Fort Meade, MD)
    …response (experience with GOTS tools is a plus) + Strong understanding of network protocols, operating systems , and cybersecurity principles + Excellent ... problems in cyber security, develop new technologies, and prototype first-of-a-kind systems . We have particular focus on enabling human operators and improving… more
    MIT Lincoln Laboratory (01/08/26)
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  • Senior Infrastructure Engineer - Secret required

    General Dynamics Information Technology (Fort Meade, MD)
    …and upgrades of all infrastructure systems . + **Troubleshooting:** Troubleshoots operating systems , network , storage, identity, virtualization, software, ... Provides guidance on installation, configuration, and maintenance of virtual hosts, operating systems , applications, and databases. Develops and presents IT… more
    General Dynamics Information Technology (12/14/25)
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  • Senior Linux Systems Administrator - 10k…

    Leidos (Annapolis Junction, MD)
    …and more. Your role will involve configuring and managing UNIX and Windows operating systems , troubleshooting, maintaining network integrity, and enhancing ... and Management:** Configure and manage UNIX and Windows operating systems , install/load software, troubleshoot, maintain network integrity, and implement… more
    Leidos (01/16/26)
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  • Senior Linux System Administrator

    Belay Technologies (Annapolis Junction, MD)
    …maintains integrity and configures network components along with implementing operating systems enhancements to improve reliability and performance. The ... integrity of and configure network components, along with implementing operating systems enhancements to improve reliability and performance + Support… more
    Belay Technologies (01/04/26)
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  • Senior Principal Software Engineer, Performance

    Oracle (Annapolis, MD)
    …performance strategy and engineering across the full stack application services, runtimes, operating systems , network , storage, and underlying hardware. You ... Qualifications Required: Expertise in systems performance across application, OS, network , storage, and hardware. Expertise in operating system and … more
    Oracle (12/11/25)
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  • Network and Computer Systems

    ManTech (Belcamp, MD)
    **MANTECH** seeks a motivated, career and customer-oriented ** Network and Computer Systems Administrator** to join our team in **Belcamp, MD** . This is an ... onsite position. The Network and Computer Systems Administrator will work...event log. + Must be capable of testing the operating system software, the networking software and also the… more
    ManTech (12/10/25)
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  • Systems Security and Network

    BOOZ, ALLEN & HAMILTON, INC. (Lexington Park, MD)
    …environment + Knowledge of cybersecurity concepts + Knowledge of Microsoft and Linux operating systems + Ability to identify security requirements for connected ... Systems Security and Network Security Engineer...GED Nice If You Have: + Experience as an Operating System Administrator, Systems Engineer, Requirements Analyst,… more
    BOOZ, ALLEN & HAMILTON, INC. (01/10/26)
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  • Systems Network Administrator…

    Leidos (Laurel, MD)
    **Description** **Leidos** has a new and exciting opportunity for a ** Systems Network Administrator** in our **National Security Sector's (NSS) Cyber & Analytics ... make a difference in National Security!** **Job Summary:** The Systems Network Administrator provides support for implementation,...and manage Linux, UNIX and Windows (or other applicable) operating systems and installs/loads operating more
    Leidos (11/18/25)
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