• Electro-Optical Model Based Systems

    Lockheed Martin (Louisville, CO)
    …career that's built for you\. Lockheed Martin Space is seeking an **Electro\-Optical MBSE Systems Engineer ** to join our team in **Sunnyvale, CA or Louisville, ... CO** \! The Model Based Systems Engineer supports the development, upkeep, and...lifecycle-from concept through deployment\. Working under the guidance of senior MBSE leads, you will help define system architecture,… more
    Lockheed Martin (12/06/25)
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  • Senior Systems Engineer

    Leidos (Gaithersburg, MD)
    …(IPSD), part of the Decision Advantage Solutions Business Area is currently seeking a Senior Systems Engineer for the Chinook Program on the Advanced ... user workgroups, and vendors to manage the 4ACES platform **Clearance Level Required:** Top Secret clearance with SCI required. Ability to successfully pass a… more
    Leidos (10/04/25)
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  • Specialist, Systems Engineer Mission…

    L3Harris (Springfield, VA)
    …domains in the interest of national security. Job Title: Specialist, Systems Engineer - Mission Protection Specialist (Active TS /SCI w/ CI Poly Required) Job ... Job Description: L3Harris Technologies is currently seeking a Specialist, Systems Engineer - Mission Protection Specialist to...of 8 years of prior related experience. * Active Top Secret /SCI with CI Poly clearance required.… more
    L3Harris (10/16/25)
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  • Senior Systems Engineer

    KBR (Chevy Chase, MD)
    Title: Senior Systems Engineer Belong. Connect. Grow. with KBR! KBR's National Security Solutions team provides high-end engineering and advanced technology ... position based upon contract award KBR is seeking a Senior Systems Engineer to join...system development and implementation, system testing, etc. + Active TS /SCI clearance is required + Ability to derive an… more
    KBR (10/08/25)
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  • Systems Engineer , Sr

    Lockheed Martin (Englewood, CO)
    **Description:** The primary responsibilities of this position will be to provide overall systems engineer support to the Fleet Ballistic Missile \(FBM\) Reentry ... and in a small team environment\. * High level of accountability\. * Top Secret security clearance\. **Security Clearance Statement:** This position requires a… more
    Lockheed Martin (10/29/25)
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  • Sr . Systems Engineer

    Serco (Lexington Park, MD)
    …**This position is contingent upon your ability to maintain your active clearance.** As a Senior Systems Engineer , you will work closely with the customer ... email to: [email protected] . Click here to apply now (https://careers-sercous.icims.com/jobs/69865/ sr .- systems - engineer /job?mode=apply&apply=yes&in\_iframe=1&hashed=-1834477830) **New to Serco?** Join… more
    Serco (09/30/25)
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  • Senior Mission / Systems

    RTX Corporation (West Valley City, UT)
    …flexibility at hiring manager discretion.** Applied Signal Technology (AST) is seeking a ** Senior Mission / Systems Engineer ** who strives for excellence ... relevant experience + 5 years of practical experience in Systems Engineering including experience with design, development and testing...Ability to obtain and maintain a US government issued Top Secret SCI ( TS /SCI) security… more
    RTX Corporation (12/11/25)
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  • Senior Model Based Systems

    KBR (El Segundo, CA)
    Title: Senior Model Based Systems Engineer KBR's National Security Solutions team provides high-end engineering and advanced technology solutions to our ... Travel Requirements: Minimal + Working Hours: Standard Required Qualifications: + Active DoD Top Secret clearance and ability to obtain a Special Compartmented… more
    KBR (12/11/25)
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  • Senior Systems Engineer

    Leidos (Gaithersburg, MD)
    …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 Ground Segment Systems

    SAIC (El Segundo, CA)
    **Description** SAIC is seeking you, our latest experienced Senior Ground Segment Systems Engineer to support to the US Space Force (USSF) in developing, ... sustaining a National Security Space system within the Space Systems Command Space Domain Awareness and Combat Power (SSC/SZ)...experience in lieu of degree). + Requires an active Top Secret clearance with the ability to… more
    SAIC (12/05/25)
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