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168 systems security engineer jobs found in Littleton

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Lockheed Martin
May 12, 2026
Cyber Systems Security Engineer III
Lockheed Martin Littleton, CO
Description: Space is a critical domain, connecting our technologies, our security and our humanity. While others view space as a destination, we see it as a realm of possibilities, where we can do more — we can innovate, invest, inspire and integrate our capabilities to transform the future. At Lockheed Martin Space, we aim to harness the full potential of space to cultivate innovation, reduce costs, and push the boundaries of what technology can achieve. We’re creating future-ready solutions, focusing on resiliency and urgency through our 21st Century Security® vision. We’re erasing boundaries and forming partnerships across industries and around the world. We’re advancing spacecraft and the workforce to fuel the next generation. And we’re reimagining how space can connect us, ensuring security and prosperity. For over 70 years, the Fleet Ballistic Missile (FBM) team has supported the Navy’s mission to provide affordable and credible strategic defense. We offer unique career...
Lockheed Martin
May 29, 2026
Mechanical Harness Design Engineer III
Lockheed Martin Littleton, CO
Description: This position is for a mid-career Electromechanical Engineer that collaborates well in a team environment, has excellent communication skills, and proactively takes initiative. We are a community of engineers looking for a dependable mid-career engineer to join our tight-knit group. In this role you will have the opportunity to support many of the Programs that LM Space supports, where partnership, integrity, and reliability are prioritized. The Harness and Cable Design group is an organization that is responsible for mechanical and electrical design tasks relating to wire harness, cable design, and interconnecting of electronic equipment. Our organization primarily supports satellite spacecraft design, however there is opportunity to support many of LM Space's missions. Location: This position does not support teleworking ; you will be located near our Lockheed Martin Space facility in: Littleton CO and be expected to work a flexible 9x80 schedule in the...
Lockheed Martin
May 29, 2026
Electrical Harness Design Engineer - III
Lockheed Martin Littleton, CO
Description: This position is for a mid-career Electrical Engineer that collaborates well in a team environment, has excellent communication skills, and proactively takes initiative. We are a community of engineers looking for a dependable mid-career engineer to join our tight-knit group. In this role you will have the opportunity to support many of the Programs that LM Space supports, where partnership, integrity, and reliability are prioritized. The Harness and Cable Design group is an organization that is responsible for mechanical and electrical design tasks relating to wire harness, cable design, and interconnecting of electronic equipment. Our organization primarily supports satellite spacecraft design, however there is opportunity to support many of LM Space's missions. Location: This position does not support teleworking; you will be located near our Lockheed Martin Space facility in: • Littleton CO and be expected to work a flexible 9x80 schedule in the office...
Lockheed Martin
May 29, 2026
Software Engineer III
Lockheed Martin Littleton, CO
Description: Space is a critical domain, connecting our technologies, our security and our humanity. While others view space as a destination, we see it as a realm of possibilities, where we can do more — we can innovate, invest, inspire and integrate our capabilities to transform the future. At Lockheed Martin Space, we aim to harness the full potential of space to cultivate innovation, reduce costs, and push the boundaries of what technology can achieve. We’re creating future-ready solutions, focusing on resiliency and urgency through our 21st Century Security® vision. We’re erasing boundaries and forming partnerships across industries and around the world. We’re advancing spacecraft and the workforce to fuel the next generation. And we’re reimagining how space can connect us, ensuring security and prosperity. Join us in shaping a new era in space and find a career that's built for you. This is an exciting opportunity to work on the Fleet Ballistic Missile Program (FBM), a...
Lockheed Martin
May 29, 2026
RF Engineer, Staff (Level IV) - Top Secret clearance
Lockheed Martin Littleton, CO
Description: Space is a critical domain, connecting our technologies, our security, and our humanity. While others view space as a destination, we see it as a realm of possibilities, where we can do more — we can innovate, invest, inspire, and integrate our capabilities to transform the future. At Lockheed Martin Space, we aim to harness the full potential of space to cultivate innovation, reduce costs, and push the boundaries of what technology can achieve. We’re creating future-ready solutions, focusing on resiliency and urgency through our 21st Century Security® vision. We’re erasing boundaries and forming partnerships across industries and around the world. We’re advancing spacecraft and the workforce to fuel the next generation. And we’re reimagining how space can connect us, ensuring security and prosperity. Join us in shaping a new era in space and find a career that's built for you. Lockheed Martin Space is seeking a Staff RF Engineer to join our team in Littleton,...
Lockheed Martin
May 29, 2026
Software Engineer III
Lockheed Martin Littleton, CO
Description: Space is a critical domain, connecting our technologies, our security and our humanity. While others view space as a destination, we see it as a realm of possibilities, where we can do more — we can innovate, invest, inspire and integrate our capabilities to transform the future. At Lockheed Martin Space, we aim to harness the full potential of space to cultivate innovation, reduce costs, and push the boundaries of what technology can achieve. We’re creating future-ready solutions, focusing on resiliency and urgency through our 21st Century Security® vision. We’re erasing boundaries and forming partnerships across industries and around the world. We’re advancing spacecraft and the workforce to fuel the next generation. And we’re reimagining how space can connect us, ensuring security and prosperity. Join us in shaping a new era in space and find a career that's built for you. This is an exciting opportunity to work on the Fleet Ballistic Missile Program (FBM), a...
Lockheed Martin
May 29, 2026
Laser Communication Engineer
Lockheed Martin Littleton, CO
Description: ***This position is contingent upon contract award to Lockheed Martin. Estimated award date is currently AUGUST 2026. Any job offers extended to chosen candidates will include a contingency clause stating that the offer is dependent on Lockheed Martin securing the contract.*** Space is a critical domain, connecting our technologies, our security, and our humanity. While others view space as a destination, we see it as a realm of possibilities, where we can do more — we can innovate, in-vest, inspire, and integrate our capabilities to transform the future. At Lockheed Martin Space, we aim to harness the full potential of space to cultivate innovation, reduce costs, and push the boundaries of what technology can achieve. We’re creating future-ready solutions, focusing on resiliency and urgency through our 21st Century Security® vision. We’re erasing boundaries and forming partnerships across industries and around the world. We’re advancing spacecraft and the...
Lockheed Martin
May 29, 2026
Software Engineer III
Lockheed Martin Littleton, CO
Description: Space is a critical domain, connecting our technologies, our security and our humanity. While others view space as a destination, we see it as a realm of possibilities, where we can do more — we can innovate, invest, inspire and integrate our capabilities to transform the future. At Lockheed Martin Space, we aim to harness the full potential of space to cultivate innovation, reduce costs, and push the boundaries of what technology can achieve. We’re creating future-ready solutions, focusing on resiliency and urgency through our 21st Century Security® vision. We’re erasing boundaries and forming partnerships across industries and around the world. We’re advancing spacecraft and the workforce to fuel the next generation. And we’re reimagining how space can connect us, ensuring security and prosperity. Join us in shaping a new era in space and find a career that's built for you. This is an exciting opportunity to work on the Fleet Ballistic Missile Program (FBM), a...
Lockheed Martin
May 29, 2026
Cyber Security Engineer
Lockheed Martin Littleton, CO
Description: The coolest jobs on this planet... or any other... are with Lockheed Martin Space. At the dawn of a new space age, Lockheed Martin Space is a pioneer, partner, innovator, and builder. Our amazing people are on a mission to make a difference in the world. Every single day, we use our unique skills and experiences to craft, design, and build solutions to some of the world's hardest engineering problems. Our culture inspires our employees to dream big; perform with excellence; and build incredible products. We provide the resources, the support, and the focus. You bring the passion and courage to envision limitless possibilities. Together, we'll build a better tomorrow. Are you ready to further your career in Cyber Security by working for one of the top companies in the world? This position is for a Cyber Security Engineer on the SDNX program. As a Cyber Security Engineer supporting the SDNX program, your responsibilities will include: • Conducting cyber risk...
Lockheed Martin
May 28, 2026
Test Engineer III, Secret Clearance
Lockheed Martin Littleton, CO
Description: The Fleet Ballistic Missile (FBM) program is seeking an Electronics Engineer to join the Electrical Ground Support Equipment (EGSE) team. Location: This position does not support teleworking ; you will be located near our Lockheed Martin Space facility in: Littleton CO and be expected to work a flexible 9x80 schedule in the office full-time. About Lockheed Martin Space Space is a critical domain, connecting our technologies, our security and our humanity. While others view space as a destination, we see it as a realm of possibilities, where we can do more — we can innovate, invest, inspire and integrate our capabilities to transform the future. At Lockheed Martin Space, we aim to harness the full potential of space to cultivate innovation, reduce costs, and push the boundaries of what technology can achieve. We’re creating future-ready solutions, focusing on resiliency and urgency through our 21st Century Security® vision. We’re erasing boundaries and...
Lockheed Martin
May 28, 2026
Orion Integrated Test Lab Lead
Lockheed Martin Littleton, CO
Description: Space is a critical domain, connecting our technologies, our security and our humanity. While others view space as a destination, we see it as a realm of possibilities, where we can do more — we can innovate, invest, inspire and integrate our capabilities to transform the future. At Lockheed Martin Space, we aim to harness the full potential of space to cultivate innovation, reduce costs, and push the boundaries of what technology can achieve. We’re creating future-ready solutions, focusing on resiliency and urgency through our 21st Century Security® vision. We’re erasing boundaries and forming partnerships across industries and around the world. We’re advancing spacecraft and the workforce to fuel the next generation. And we’re reimagining how space can connect us, ensuring security and prosperity. Join us in shaping a new era in space and find a career that's built for you. We are seeking a highly experienced systems engineer to lead the Orion Integrated Test Lab...
Lockheed Martin
May 28, 2026
Software Engineer Staff, Level 4 - Clearance Required
Lockheed Martin Littleton, CO
Description: Space is a critical domain, connecting our technologies, our security and our humanity. While others view space as a destination, we see it as a realm of possibilities, where we can do more — we can innovate, invest, inspire and integrate our capabilities to transform the future. At Lockheed Martin Space, we aim to harness the full potential of space to cultivate innovation, reduce costs, and push the boundaries of what technology can achieve. We’re creating future-ready solutions, focusing on resiliency and urgency through our 21st Century Security® vision. We’re erasing boundaries and forming partnerships across industries and around the world. We’re advancing spacecraft and the workforce to fuel the next generation. And we’re reimagining how space can connect us, ensuring security and prosperity. Join us in shaping a new era in space and find a career that's built for you. Space Protection Programs is seeking an experienced Software Engineer who can guide a...
Lockheed Martin
May 28, 2026
Software Engineer Staff, Level 4 - Clearance Required
Lockheed Martin Littleton, CO
Description: Space is a critical domain, connecting our technologies, our security and our humanity. While others view space as a destination, we see it as a realm of possibilities, where we can do more — we can innovate, invest, inspire and integrate our capabilities to transform the future. At Lockheed Martin Space, we aim to harness the full potential of space to cultivate innovation, reduce costs, and push the boundaries of what technology can achieve. We’re creating future-ready solutions, focusing on resiliency and urgency through our 21st Century Security® vision. We’re erasing boundaries and forming partnerships across industries and around the world. We’re advancing spacecraft and the workforce to fuel the next generation. And we’re reimagining how space can connect us, ensuring security and prosperity. Join us in shaping a new era in space and find a career that's built for you. Space Protection Programs is seeking an experienced Software Engineer who can guide a...
Lockheed Martin
May 28, 2026
Senior Software Engineer, Level 3 - Clearance Required
Lockheed Martin Littleton, CO
Description: Space is a critical domain, connecting our technologies, our security and our humanity. While others view space as a destination, we see it as a realm of possibilities, where we can do more — we can innovate, invest, inspire and integrate our capabilities to transform the future. At Lockheed Martin Space, we aim to harness the full potential of space to cultivate innovation, reduce costs, and push the boundaries of what technology can achieve. We’re creating future-ready solutions, focusing on resiliency and urgency through our 21st Century Security® vision. We’re erasing boundaries and forming partnerships across industries and around the world. We’re advancing spacecraft and the workforce to fuel the next generation. And we’re reimagining how space can connect us, ensuring security and prosperity. Join us in shaping a new era in space and find a career that's built for you. Space Protection Programs is seeking an experienced Software Engineer who can guide a...
Lockheed Martin
May 28, 2026
Test Engineer III, Secret Clearance
Lockheed Martin Littleton, CO
Description: The Fleet Ballistic Missile (FBM) program is seeking an Electronics Engineer to join the Electrical Ground Support Equipment (EGSE) team. Location: This position does not support teleworking ; you will be located near our Lockheed Martin Space facility in: Littleton CO and be expected to work a flexible 9x80 schedule in the office full-time. About Lockheed Martin Space Space is a critical domain, connecting our technologies, our security and our humanity. While others view space as a destination, we see it as a realm of possibilities, where we can do more — we can innovate, invest, inspire and integrate our capabilities to transform the future. At Lockheed Martin Space, we aim to harness the full potential of space to cultivate innovation, reduce costs, and push the boundaries of what technology can achieve. We’re creating future-ready solutions, focusing on resiliency and urgency through our 21st Century Security® vision. We’re erasing boundaries and...
Lockheed Martin
May 28, 2026
Test Engineer II, Secret Clearance
Lockheed Martin Littleton, CO
Description: The Fleet Ballistic Missile (FBM) program is seeking an Electronics Engineer to join the Electrical Ground Support Equipment (EGSE) team. Location: This position does not support teleworking ; you will be located near our Lockheed Martin Space facility in: Littleton CO and be expected to work a flexible 9x80 schedule in the office full-time. About Lockheed Martin Space Space is a critical domain, connecting our technologies, our security and our humanity. While others view space as a destination, we see it as a realm of possibilities, where we can do more — we can innovate, invest, inspire and integrate our capabilities to transform the future. At Lockheed Martin Space, we aim to harness the full potential of space to cultivate innovation, reduce costs, and push the boundaries of what technology can achieve. We’re creating future-ready solutions, focusing on resiliency and urgency through our 21st Century Security® vision. We’re erasing boundaries and...
Lockheed Martin
May 28, 2026
Electronics Engineer III, Missile Avionics, Secret Clearance
Lockheed Martin Littleton, CO
Description: Join Our Team as an Avionics Electronics Design Engineer where you will work on the development of a sophisticated state-of-the-art avionics product in a world class Integrated Product Development environment. Location: This position does not support teleworking ; the selected candidate will be located near our Lockheed Martin Space facility in: • Englewood or Littleton CO • Titusville FL You will work a flexible 9x80 schedule in the office full-time. Space is a critical domain, connecting our technologies, our security, and our humanity. While others view space as a destination, we see it as a realm of possibilities, where we can do more — we can innovate, invest, inspire, and integrate our capabilities to transform the future. At Lockheed Martin Space, we aim to harness the full potential of space to cultivate innovation, reduce costs, and push the boundaries of what technology can achieve. We’re creating future-ready solutions, focusing on resiliency...
Lockheed Martin
May 27, 2026
RF Engineer
Lockheed Martin Littleton, CO
Description: ***This position is contingent upon contract award to Lockheed Martin. Estimated award date is currently July 2026. Any job offers extended to chosen candidates will include a contingency clause stating that the offer is dependent on Lockheed Martin securing the contract.*** Position details: Location: Littleton, CO Work Schedule: 9x80 Position type: Full-time onsite (this is not a hybrid position) _____________________________________________ Lockheed Martin Space is seeking an RF Engineer to join our team in Littleton, CO ! As an RF Engineer, you will architect, design, and develop RF systems and circuitry, including receivers, transmitters, antennas, and frequency synthesizers. You will perform hardware layout, component evaluation, prototype construction, and test, while supporting manufacturing during assembly and verification. You will also develop RF system and subsystem architectures, perform link analysis, and track technical performance...
Lockheed Martin
May 27, 2026
RF Engineer
Lockheed Martin Littleton, CO
Description: ***This position is contingent upon contract award to Lockheed Martin. Estimated award date is currently July 2026. Any job offers extended to chosen candidates will include a contingency clause stating that the offer is dependent on Lockheed Martin securing the contract.*** Position details: Location: Littleton, CO Work Schedule: 9x80 Position type: Full-time onsite (this is not a hybrid position) _____________________________________________ Lockheed Martin Space is seeking an RF Engineer to join our team in Littleton, CO ! As an RF Engineer, you will architect, design, and develop RF systems and circuitry, including receivers, transmitters, antennas, and frequency synthesizers. You will perform hardware layout, component evaluation, prototype construction, and test, while supporting manufacturing during assembly and verification. You will also develop RF system and subsystem architectures, perform link analysis, and track technical performance...
Lockheed Martin
May 27, 2026
Mission Systems Engineer
Lockheed Martin Littleton, CO
Description: WHO WE ARE Lockheed Martin is a global leader in aerospace, defense, and technology solutions, dedicated to pushing the boundaries of innovation and shaping the future of the industry. With a rich legacy of excellence and a commitment to delivering advanced capabilities to our customers, we are proud to be at the forefront of cutting-edge technology and engineering. LM SPACE: WHAT WE'RE DOING Space is a critical domain, connecting our technologies, our security and our humanity. While others view space as a destination, we see it as a realm of possibilities, where we can do more — we can innovate, invest, inspire and integrate our capabilities to transform the future. And we’re reimagining how space can connect us, ensuring security and prosperity. At Lockheed Martin Space, we aim to harness the full potential of space to cultivate innovation, reduce costs, and push the boundaries of what technology can achieve. We’re creating future-ready solutions, focusing on...
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