• Senior Security Systems Engineer

    Cydecor, Inc. (Crystal City, TX)
    …Environment (CE) training within six (6) months of hire. Security Clearance: + Active Top Secret or higher required ( SCI eligibility preferred). + Any ... Job Description: Cydecor is seeking a Senior Security Systems Engineer to support cybersecurity and systems engineering for US...Validator supporting SLBM must also possess TS with SCI eligibility. Education: + Bachelor's… more
    Cydecor, Inc. (11/20/25)
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  • Spec, Integration & Test Engineer 1

    L3Harris (Greenville, TX)
    …/ SCI clearance. + Must be a US Citizen. Preferred Additional Skills: + Active Top Secret with SCI . + Experience with IBM DOORS Requirements Management ... of national security. Job Title: Specialist, Integration and Test Engineer Job Code: 30975 Job Location: Greenville, TX (On-Site)...six months of employment. + Must have an active Secret clearance with the ability to obtain and maintain… more
    L3Harris (11/08/25)
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  • Scientist, Systems Engineer

    L3Harris (Greenville, TX)
    …background. + Must have an active Secret clearance with the ability to obtain/maintain Top Secret with SCI . + Must be a US Citizen. Preferred Additional ... the interest of national security. Job Tile: Scientist, Systems Engineer Job Code: 30692 Job Location: Greenville, TX (On-Site)...Skills: + Active Top Secret with SCI . #LI-AH1… more
    L3Harris (11/06/25)
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  • Sr. Associate, Systems Engineer

    L3Harris (Greenville, TX)
    …an active Secret clearance at the time of hire with the ability to obtain a Top Secret with SCI . + Must be a US Citizen. Preferred Additional Skills: + ... interest of national security. Job Title: Sr. Associate, Systems Engineer (COMINT/SIGINT) Job Code: 30915 Job Location: Greenville, TX...Active Top Secret w/ SCI clearance. +… more
    L3Harris (11/08/25)
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  • Systems Engineer - Level 2

    Lockheed Martin (Fort Worth, TX)
    …security clearance, you must be a US Citizen for consideration\. **Clearance Level:** Top Secret **Other Important Information You Should Know** **Expression ... conflict, and manage interpersonal dynamics * Security\+ Certification * TS / SCI Clearance will be required for this...SCI Clearance will be required for this role \( Secret to start with Investigation in last 6 years\)… more
    Lockheed Martin (11/19/25)
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  • Systems Engineer Stf - Level 4

    Lockheed Martin (Fort Worth, TX)
    …security clearance, you must be a US Citizen for consideration\. **Clearance Level:** Top Secret **Other Important Information You Should Know** **Expression ... conflict, and manage interpersonal dynamics * Security\+ Certification * TS / SCI Clearance will be required for this...SCI Clearance will be required for this role \( Secret to start with Investigation in last 6 years\)… more
    Lockheed Martin (09/13/25)
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  • Sr Staff Cyber Systems Engineer

    Northrop Grumman (San Antonio, TX)
    …A current/active DoD Secret clearance + The ability to obtain and maintain a DoD Top Secret w/ SCI clearance is required. + The ability to obtain and ... join our team as a Sr Staff Cyber Systems Engineer to join the Sentinel Mission Defense Team based...Briefed to the Sentinel program + A current/active DoD Top Secret w/ SCI and SAP… more
    Northrop Grumman (11/15/25)
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  • Specialist, Systems Engineer

    L3Harris (Greenville, TX)
    …an active Secret clearance at the time of hire with the ability to obtain a Top Secret with SCI . + Must be a US Citizen. Preferred Additional Skills: + ... the interest of national security. Job Title: Specialist, Systems Engineer Job Code: 30582 Job Location: Greenville, TX (On-Site)...Active Top Secret / SCI Security Clearance. #LI-AH1… more
    L3Harris (11/08/25)
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  • Sr. Specialist, Systems Engineer 1

    L3Harris (Greenville, TX)
    …platforms. + Active Secret at the time of hire with the ability to obtain a Top Secret with SCI . + Must be a US Citizen. P referred Additional Skills: ... interest of national security. Job Title: Sr. Specialist, Systems Engineer Job Code: 30672 Job Location: Greenville, Texas Job...+ CompTIA Security+ Certification + Active Top Secret with SCI . #LI-AH1… more
    L3Harris (11/08/25)
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  • Sr. Scientist, Systems Engineer

    L3Harris (Greenville, TX)
    …documents. + Travel up to 10% of the time. + Ability to obtain and maintain a Top Secret with SCI . Clearance. + Other duties as assigned by Supervisor. ... interest of national security. Job Title: Sr. Scientist, Systems Engineer Job Code: 30671 Job Location: Greenville, TX (On-Site)...be a US Citizen. Preferred Additional Skills: + Active Top Secret with SCI . #LI-AH1… more
    L3Harris (11/01/25)
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