• Senior Security Systems…

    Cydecor, Inc. (Dahlgren, VA)
    …unyielding commitment to Excellence, what separates us. Job Description: Cydecor is seeking a Senior Security Systems Engineer to support cybersecurity and ... Environment (CE) training within six (6) months of hire. Security Clearance: + Active Top Secret or higher required (SCI eligibility preferred). + Any Validator… more
    Cydecor, Inc. (12/21/25)
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  • Senior Specialist, Systems…

    L3Harris (Springfield, VA)
    …cyber domains in the interest of national security. Job Title: Senior Specialist, Systems Engineer - Strategic Planner ( TS /SCI w/ CI Poly Required) Job ... Description: L3Harris Technologies currently has an opening for a Senior Specialist, Systems Engineer -...of 8 years of prior related experience. + Active Top Secret /SCI with Poly clearance required. +… more
    L3Harris (10/16/25)
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  • Senior Systems Engineer

    Leidos (Alexandria, VA)
    …Advantage Solutions Business Area, is currently seeking a highly motivated and experienced Senior Systems Engineer for the Chinook Program. The selected ... candidate will lead systems engineering activities across the enterprise to help the...St. Louis, MO + Tucson, AZ **Clearance Level Required:** Top Secret with SCI eligibility and able… more
    Leidos (11/22/25)
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  • Senior Systems Engineer…

    RTX Corporation (Dulles, VA)
    …problems that create a safer, more secure world. Raytheon Technologies is seeking a Senior Systems Engineer (MBSE) to provide enterprise-wide systems ... as only US citizens are eligible for a security clearance​ **Security Clearance:** TS /SCI with CI Poly - Current At Raytheon, the foundation of everything we… more
    RTX Corporation (10/13/25)
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  • Senior Systems Engineer Tier…

    UIC Government Services and the Bowhead Family of Companies (Quantico, VA)
    **Overview** SENIOR SYSTEMS ENGINEER | TIER III (MIELS): Bowhead is seeking Senior Systems Engineers to support a customer in Stafford, VA. Support ... /SCI level with Counter Intelligence Polygraph. US Citizenship is a requirement for Top Secret clearance at this location. \#LI-KC1 Applicants may be subject… more
    UIC Government Services and the Bowhead Family of Companies (01/09/26)
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  • Systems Engineer

    KBR (Chantilly, VA)
    Title: Systems Engineer Belong. Connect. Grow. with KBR! KBR's National Security Solutions team provides high-end engineering and advanced technology solutions ... protecting our national security. KBR is seeking a System Engineer to work on an exciting, fast-paced program in...crisis action program and contingency locations. + Collaborate with senior government leadership, SETA team members for COOP and… more
    KBR (12/19/25)
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  • Systems Engineer - Senior

    Parsons Corporation (Centreville, VA)
    …possible. **Job Description:** Our Special Programs and Systems team is hiring a Senior Systems Engineer with a passion for mission excellence in our ... small team environment to enable operational success of deployed systems . This role includes system design, configuration, and debugging...be a US Citizen + Must possess and maintain Top Secret SCI clearance with CI poly… more
    Parsons Corporation (12/06/25)
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  • Crypto Systems Engineer

    KBR (Chantilly, VA)
    Title: Crypto Systems Engineer Belong. Connect. Grow. with KBR! Support the Directorate by evaluating and certifying the implementation, integration, and ... cryptographic-related cyber security solutions into customer-owned or controlled Space systems , through robust cryptographic security engineering and information … more
    KBR (12/06/25)
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  • Enterprise Integration Systems…

    SAIC (Chantilly, VA)
    …while increasing their responsibilities. SAIC has an opening for a Enterprise Integration Systems Engineer to provide Systems Engineering and Technical ... is responsible for designing, building, and operating national security-related systems based in space, in the air, and on...at least 9 years of relevant experience + Active TS /SCI clearance with polygraph + Strong technical fundamentals in… more
    SAIC (11/12/25)
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  • Hypersonic Senior Systems…

    Leidos (Arlington, VA)
    **Description** The Electronic Warfare Division has an opening for an experienced Hypersonic Systems Engineer . Leidos is looking for experienced engineers with a ... Hypersonics Aerospace background to lead Systems development and Modeling and Simulation (M&S) efforts based...Payload integration Clearance: Must be a US Citizen. Active Secret clearance required, Top Secret … more
    Leidos (12/20/25)
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