• ASRC Industrial Services (Westminster, CO)
    Environmental/Ecological Engineer - Westminster, CO Summary **Title:** Environmental/Ecological Engineer - Westminster, CO **ID:** 2339 - RSI - 06 Description ... group's technical work and mission objectives. **Job Title:** Environmental/Ecological Engineer **Location(s):** Westminster, CO **Status:** Full-Time **FLSA:** Exempt **Hiring… more
    DirectEmployers Association (10/25/25)
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  • Epsilon, Inc (Lakewood, CO)
    **Enterprise Monitoring Engineer I** **Epsilon is now part of AMERICAN SYSTEMS !** We are pleased to announce Epsilon, Inc. has joined AMERICAN SYSTEMS . ... will operate as a wholly owned subsidiary of AMERICAN SYSTEMS until December 31, 2025, transitioning fully to AMERICAN...to obtain and maintain the appropriate level of Security Clearance or Public Trust. Adjudication of the required more
    DirectEmployers Association (10/23/25)
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  • Applied Research Associates, Inc. (Littleton, CO)
    …ballistics modeling and experimentation + Design & Prototyping-software, electronics, mechanical systems + Optical System R&D - remote sensing, laser analysis, ... US citizen and be able to obtain a security clearance . This position will initially support active contracts based...end users. What you'll do as an ARA Staff Scientist/ Engineer : + Acquire and develop in-depth understanding of laser/optical… more
    DirectEmployers Association (10/17/25)
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  • Applied Research Associates, Inc. (Littleton, CO)
    …customers and end users. We are seeking a dynamic, highly skilled Engineer /Researcher with a background in uncrewed underwater vehicles (UUVs) to support research, ... arrays, hydrophones, sonar, and/or inertial sensors + Develop vehicle autonomy systems , including those leveraging inertial navigation or active heave compensation +… more
    DirectEmployers Association (10/07/25)
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  • Applied Research Associates, Inc. (Littleton, CO)
    …ballistics modeling and experimentation + Design & Prototyping-software, electronics, mechanical systems + Optical System R&D - remote sensing, laser analysis, ... end users. What you'll do as an ARA Junior Scientist/ Engineer : + Conduct research and development in optical sensors,...hold or have the ability to obtain a security clearance + On-site work at ARA's Littleton, Colorado facility… more
    DirectEmployers Association (10/22/25)
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  • Systems Engineer - Clearance

    Lockheed Martin (Littleton, CO)
    **Description:** **WHAT WE'RE DOING** At Lockheed Martin, we engineer innovative solutions to deliver resilient systems , products, and services across evolving ... and networking equipment \- Demonstrated skills with utilizing, installing and administrating Linux/Unix systems \- Travel will be required to fulfill the duties… more
    Lockheed Martin (11/01/25)
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  • Mission Systems Engineer

    Lockheed Martin (Littleton, CO)
    …is within the Mission Engineering and Operations \(MEO\) organization as a Mission Systems Engineer \. This position is to support spacecraft operations and ... to effectively communicate with peers and customers \- Active Top Secret security clearance with the ability to obtain and maintain a TS/SCI **Desired Skills:** \-… more
    Lockheed Martin (10/29/25)
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  • Senior Systems Safety Engineer

    Lockheed Martin (Littleton, CO)
    …are with Lockheed Martin Space\! As we enter a new era of Strategic Weapon Systems , we are a pioneer, partner, innovator and builder\. Do you have a passion for ... CO has an immediate opening for a System Safety Engineer to help field a new weapon system that...and risk, and supportability and effectiveness analyses for total systems \. Analyses are performed at all levels of total… more
    Lockheed Martin (10/11/25)
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  • Principal/Senior Principal Systems

    Northrop Grumman (Aurora, CO)
    …making history. **About the Team:** We are looking for a Principal or Senior Principal Systems Engineer to join our team at Buckley Space Force Base! Our team ... our employees have incredible opportunities to work on revolutionary systems that impact people's lives around the world today,... Clearance and Citizenship Requirements:** A Top-Secret security clearance is required to start on day… more
    Northrop Grumman (08/22/25)
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  • Electronics Responsible Engineer V, Top…

    Lockheed Martin (Littleton, CO)
    …an active TOP SECRET clearance with the ability to obtain TS/SCI Security Clearance \. Thus US Citizenship is required \. **Desired Skills:** * Masters or PhD ... **Description:** Please join us as a **Responsible Product Engineer /Certified Principal Engineer ** , where you...the design, development, test and integration of digital electronics systems \. This role is a critical one that will… more
    Lockheed Martin (09/13/25)
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  • Senior Staff Project Engineer - Secret…

    Lockheed Martin (Littleton, CO)
    …products for over 20 years\. What We're Doing: At Lockheed Martin we engineer innovative solutions to deliver resilient systems , products, and services across ... Who We Are: Lockheed Martin \(LM\) Rotary and Mission Systems \(RMS\) is looking for project engineering professionals to...Solution \(CDS\) products\. This position is for a Project Engineer \(PE\) on the Radiant Mercury \(RM\) product and/or… more
    Lockheed Martin (11/05/25)
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  • RF Engineer - Antenna Element CPE (Level…

    Lockheed Martin (Littleton, CO)
    …and/or Special Test Equipment \(STE\) \-Certification and training as Certified Principal Engineer \(CPE\), Responsible Systems Engineer \(RSE\), or ... you\. Lockheed Martin Space is seeking a mid\-career RF Engineer to join our team in Littleton, CO\! We...clearance with the ability to obtain a TS/SCI clearance ; US citizenship required **Desired Skills:** \-Degree… more
    Lockheed Martin (10/10/25)
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  • RF Engineer , Senior Staff (Level V) - Top…

    Lockheed Martin (Littleton, CO)
    …milestones\. Successful applicants will have experience working as a Certified Principle Engineer \(CPE\), Responsible Systems Engineer \(RSE\), or ... Lockheed Martin Space is seeking a Senior Staff RF Engineer \(level 5\) to join our team in Littleton,...* Prior to starting employment, selected candidates will be required to possess Top Secret clearance \. For… more
    Lockheed Martin (10/29/25)
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  • RF Engineer , Staff (Level IV) - Top Secret…

    Lockheed Martin (Littleton, CO)
    …milestones\. Successful applicants will have experience working as a Certified Principle Engineer \(CPE\), Responsible Systems Engineer \(RSE\), or ... like GRASP, HFSS, or CST\. * Lead efforts in systems engineering, analysis, calibration, verification, and validation across the...* Prior to starting employment, selected candidates will be required to possess Top Secret clearance \. For… more
    Lockheed Martin (08/28/25)
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  • Survivability & Nuclear Hardness Engineer

    Lockheed Martin (Littleton, CO)
    …Secret clearance is necessary to be considered and is the minimum level of clearance required prior to start\. * Candidates must have the ability to obtain ... II D5 fleet Ballistic Missile\. As a Survivability Staff Engineer , you will lead and / or support the...a focus on Nuclear Hardness and Survivability engineering\. Security Clearance / Work Authorization: * To meet requirements of… more
    Lockheed Martin (10/29/25)
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  • Circuit Design Engineer IV, Secret…

    Lockheed Martin (Littleton, CO)
    …as a technical lead or responsible engineer \. * Active **Secret clearance ** thus **US Citizenship** is required \. **Desired Skills:** * Experienced at ... **Description:** Join Our Team as an **Avionics Circuit Design Engineer ** where you will work on the development of a sophisticated state\-of\-the\-art avionics… more
    Lockheed Martin (09/10/25)
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  • Mechanical Engineer (TS/SCI with Polygraph…

    Fluor (Aurora, CO)
    …* Must have an Active (or ability to obtain & maintain) TS/SCI with Poly Clearance Required * Must demonstrate basic computer knowledge (Ie, ability to use ... have an active (or ability to obtain/maintain) a TS/SCI with polygraph clearance Provides facilities mechanical engineering analysis and oversight in support of… more
    Fluor (10/16/25)
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  • RF Engineer (Level II) - TS/SCI…

    Lockheed Martin (Littleton, CO)
    …be aU\.S\. Citizen\. * Prior to starting employment, selected candidates will be required to possess TS/SCI clearance \. For this position, applicants must ... - - Lockheed Martin Space is seeking an RF Engineer to join our team in Littleton, CO\! As...will work closely with other RF Engineers, Box and Sub\- systems CPEs, leaders, and Subject Matter Experts to ensure… more
    Lockheed Martin (10/10/25)
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  • Project Engineer III, Missile Electronics,…

    Lockheed Martin (Englewood, CO)
    …* 5\+ years professional experience; 3\+ years with Masters degree\. * Current **Secret clearance ** , thus **US Citizenship** is required \. - - - **Why Lockheed ... **Description:** Join Our Team as a **Project Engineer ** where you will work on the development...a US Citizen with an active US DoD **SECRET clearance ** , to support this government contract\. **Desired Skills:**… more
    Lockheed Martin (10/31/25)
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  • RF Engineer , Senior (Level III) - Secret…

    Lockheed Martin (Littleton, CO)
    …Flight and Interplanetary Missions, Missile Defense, and more\. As a Senior RF Engineer within Lockheed Martin Space, you will perform the following: * Support ... Experts to participate in design reviews and provide feedback/input on RF systems and hardware designs * Collaborate with cross\-functional teams to ensure… more
    Lockheed Martin (10/22/25)
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