• Chief Engineer

    SAIC (Hampton, VA)
    …regulations. **Key Responsibilities:** 1. Technical Leadership: + Serve as the technical authority and subject matter expert ( SME ) for the AOC Falconer ... balancing competing priorities in high-stakes environments. **Clearance Requirements:** + Active Secret clearance required; Top Secret /SCI eligibility… more
    SAIC (01/06/26)
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  • Senior Systems Engineer Tier III

    UIC Government Services and the Bowhead Family of Companies (Quantico, VA)
    …detection, intrusion forensics, and network recovery hardware / software . + Preferred: Subject matter expert with DoD cyber protection team tools, ... **Overview** SENIOR SYSTEMS ENGINEER | TIER III (MIELS): Bowhead is seeking...Counter Intelligence Polygraph. US Citizenship is a requirement for Top Secret clearance at this location. \#LI-KC1… more
    UIC Government Services and the Bowhead Family of Companies (01/09/26)
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  • System Administrator

    Parsons Corporation (Colorado Springs, CO)
    …Information (SCI) and Special Access Program (SAP) activities. **"What You'll Be Doing"** + Provides Subject Matter Expert ( SME ) support to Tier 1 ... create game changing space solutions by teaming highly respected subject matter experts with brilliant technologists. Do...accredited university with minimum 8 years of experience + Top Secret ( TS ) security clearance… more
    Parsons Corporation (11/14/25)
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  • Systems Engineer Staff (Level 4)

    Lockheed Martin (Littleton, CO)
    …happen in order to mitigate them and maintain schedule * Current or Active Top Secret clearance, thus US Citizenship is required\. * **A successful candidate ... Space is looking for an innovative and experienced Systems Engineer to support the team that designs, develops, fields...our Littleton, CO campus\. **Basic Qualifications:** * Current/Active DoD Top Secret Security Clearance * Familiarity with… more
    Lockheed Martin (12/06/25)
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  • Sr Principal Systems Engineer

    RTX Corporation (Richardson, TX)
    …provide the training and tools to help grow the skills you will need to become a subject matter expert ( SME ) in the systems engineering lifecycle. You ... only US citizens are eligible for a security clearance **Security Clearance:** DoD Clearance: Top Secret **Are you looking to make a meaningful, positive impact… more
    RTX Corporation (11/01/25)
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  • UC Engineer - Principal

    Amentum (Fort Meade, MD)
    …Address challenges related to data flow, security policies, and interoperability **Requirements:** * Subject Matter Expert in UC design, Edge services, ... up to 20% **Clearance Required:** * Must have active Top Secret clearance with SCI eligibility **Minimum...Cisco Certified Network Professional (CCNP) - Collaboration certification * Subject Matter Expert of Cisco… more
    Amentum (12/09/25)
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  • Systems Engineer

    ManTech (Washington, DC)
    …to drive workload automation and continuous process improvement across the enterprise. + Provide Subject Matter Expert ( SME ) guidance to customers, ... and/or other scripting languages **Clearance Requirements:** + Must have a current/active DOD Top Secret security clearance, adjudicated within the last 6 years… more
    ManTech (12/28/25)
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  • Consulting Systems Engineer - Ship…

    Northrop Grumman (Baltimore, MD)
    …the best work of your career. The Surface Ship Construction & Sensor Installation Subject Matter Expert provides technical leadership and expertise across ... global security environments, Northrop Grumman brings informed insights and software -secure technology to enable strategic planning. We're looking for...related technical fields. + A current / active DoD Top Secret Clearance or higher + Prior… more
    Northrop Grumman (12/19/25)
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  • Senior Lead Engineer - Public Sector

    Lumen (Lansing, MI)
    …solutions to meet the objectives of the team. The candidate should be considered the Subject Matter Expert ( SME ) in multiple technologies, architectures, ... will be able to rapidly identify and resolve problems, engineer , identify, and become proficient in the latest technology...a US Citizen with an active Department of Defense TOP SECRET clearance **Compensation** This information reflects… more
    Lumen (01/09/26)
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  • Test Engineer

    Koniag Government Services (Vienna, VA)
    …+ Function as a Subject Matter Expert ( SME ) regarding the organization's testing software and methodologies and provide recommendations to ... a Koniag Government Services company, is seeking a Test Engineer with a TS /SCI security clearance to...prioritize test activities for each iteration. + Serve as subject matter specialist, and provide testing knowledge… more
    Koniag Government Services (12/10/25)
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