• Sr Systems Engineer - Operations Research

    Sierra Nevada Company, LLC (Lone Tree, CO)
    …programming or standard tools such as Matlab, Python, and C++. + **A current/active Top Secret US Security Clearance with SCI Eligibility is required.** ... . **IMPORTANT NOTICE:** This position requires current/active Top Secret with SCI eligibility US Security Clearance. US Citizenship… more
    Sierra Nevada Company, LLC (07/18/25)
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  • Systems Engineer II - Military Operations…

    Sierra Nevada Company, LLC (Lone Tree, CO)
    …such as Matlab, Python, and C++. + **Eligible to obtain/maintain Top Secret with SCI eligibility US Security Clearance is required** **Qualifications We ... . **IMPORTANT NOTICE:** This position requires current/active Top Secret with SCI eligibility US Security Clearance. US Citizenship… more
    Sierra Nevada Company, LLC (07/02/25)
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  • Systems Engineer Staff, Weapon System…

    Lockheed Martin (Littleton, CO)
    …* Strong team collaboration, communication and presentation skills * Active or Current Top Secret security clearance ** Security Clearance Statement:** ... clearance, you must be a US Citizen for consideration\. **Clearance Level:** Top Secret **Other Important Information You Should Know** **Expression of… more
    Lockheed Martin (07/18/25)
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  • Space Systems Cyber Security…

    General Atomics (Englewood, CO)
    …defense, civil, commercial, and academic mission requirements. We're seeking a Space Systems Cyber Security Engineer to join our team in Englewood, CO. In this ... role, you'll collaborate closely with the lead cyber security engineer to implement program strategies aimed...+ Must have or be able to obtain a TS /SCI security clearance. **Preferred Qualifications:** + Experience… more
    General Atomics (07/09/25)
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  • Sr Principal Systems Engineer

    Sierra Nevada Company, LLC (Lone Tree, CO)
    …IRaD (Research and Development) roadmaps, and seeing them through to completion. + **Current Top Secret clearance with SCI eligibility, as well as experience in ... them from operational concept through preliminary and detailed design, simulation, and test using progressive tools. As a cross-functional engineer , you are… more
    Sierra Nevada Company, LLC (07/18/25)
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  • Principal Aerospace Engineer

    Sierra Nevada Company, LLC (Lone Tree, CO)
    …. **IMPORTANT NOTICE:** This position requires the ability to obtain and maintain a Top Secret US Security Clearance. US Citizenship status is required ... The ISR (Intelligence, Surveillance & Reconnaissance), Aviation, and Security (IAS) business area is a leader in ISR and aviation, it is a leading prime manned and… more
    Sierra Nevada Company, LLC (05/28/25)
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  • Sr Software Systems Engineer

    Sierra Nevada Company, LLC (Lone Tree, CO)
    …. **IMPORTANT NOTICE:** This position requires the ability to obtain and maintain a Top Secret US Security Clearance. US Citizenship status is required ... 10 or more years of relevant experience + The ability to obtain/maintain a Secret US Security Clearance is required + Experience with architecting and developing… more
    Sierra Nevada Company, LLC (06/03/25)
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  • Experienced Engineers - Multiple Disciplines

    Lockheed Martin (Highlands Ranch, CO)
    …an accredited college in a related discipline * Ability to obtain and maintain a Top Secret security clearance, thus US Citizenship is required\. **Desired ... - **What does this role look like?** * Systems Engineer \- Requirements & Verification, Integration, Test ,...Skills:** * Active Secret or Top Secret clearance… more
    Lockheed Martin (07/12/25)
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  • Sr. Integration Systems Engineer

    Parsons Corporation (Boulder, CO)
    …system integration validation and ICD constructs ** Security Clearance Requirement:** An active Top Secret SCI security clearance is required for this ... in Space because we understand that ensuring our nation's security for future generations depends on it. Parsons creates...experts with brilliant technologists. Are you an experienced Systems Engineer looking to grow your skillset and work on… more
    Parsons Corporation (06/24/25)
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  • Cable and Harness ElectroMechanical…

    Lockheed Martin (Littleton, CO)
    …12\+ years with Masters degree\. * Qualified candidate must hold an active DoD **Final Secret Security Clearance** ; thus US Citizenship is required\. - - - ... grade applications\. * Must have an active DoD **Final Secret Security Clearance** ; thus US Citizenship...must be a US Citizen for consideration\. **Clearance Level:** Top Secret **Other Important Information You Should… more
    Lockheed Martin (07/18/25)
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