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12 principal software engineer jobs found

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Lockheed Martin
Jun 13, 2026
Systems Engineer, Principal - Survivability & Nuclear Hardness
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. As a Principal Systems Engineer and the authority in Survivability Engineering, you will...
Lockheed Martin
Jun 04, 2026
SDN Backbone Chief Engineer
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. This position is contingent upon contract award to Lockheed Martin. Estimated award date is currently August 2026. The applicant selected will be subject to a...
Lockheed Martin
Jun 04, 2026
Simulation Systems Integration Engineer
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. A Level 5 Simulation Integration Engineer is a senior role responsible for...
Lockheed Martin
Jun 02, 2026
Electronics Responsible Engineer III
Lockheed Martin Littleton, CO
Description: Please join us as a Responsible Product Engineer/Certified Principal 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: • Littleton CO You will be working a flexible 9x80 schedule in the office full-time. What does this role look like? The Digital and Analog Talent Center is looking for an experienced Responsible Engineer/Certified Principal Engineer (CPE) to oversee the design, development, test and integration of digital electronics systems. This role is a critical one that will build your skills and knowledge in technical disciplines required to design and realize a complex digital product. At the same time, you will leverage technical leadership principles to ensure that your team is successful in...
Lockheed Martin
Jun 02, 2026
Electronics Responsible Engineer V
Lockheed Martin Littleton, CO
Description: Please join us as a Responsible Product Engineer/Certified Principal 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: 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...
Lockheed Martin
Jun 02, 2026
Space Vehicle (SV) Systems Design Lead
Lockheed Martin Littleton, CO
Description: "Ahead of Ready" 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 has new opportunities that provide you with a chance to challenge the status quo and transform our mission. Due to the classified nature of this opportunity, we're not at liberty to share everything you’ll do on this program, but know that you will play a part in building end-to-end solutions and redefining the mission segment....
Lockheed Martin
May 27, 2026
Electronics Engineer IV, Product Engineer, Secret Clearance
Lockheed Martin Littleton, CO
Description: Join Our Team as an Electronics 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 ; 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...
Lockheed Martin
May 23, 2026
Space System Demo Chief Engineer (CE)
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 (LM) Space is seeking a Chief Engineer (CE) to lead a space system...
Lockheed Martin
May 15, 2026
Responsible Systems Engineer
Lockheed Martin Englewood, CO
Description: The Responsible Systems Engineer (RSE) for the FBM Program Boost Control System (PBCS) serves as the single technical point of contact for the entire PBCS suite and each constituent product, providing continuity of product knowledge, source data, and traceability of all system relationships, owners, and required accountabilities. Acting as a knowledgeable, experienced, and trained specialist, the RSE advocates for the product throughout its lifecycle—from requirements definition through mission operations—and leads the life‑extension effort to ensure sustained reliability, availability, and performance. In this role the engineer collaborates with software, hardware, configuration‑management, test, logistics, and program‑management teams to develop integration strategies, conduct risk‑based assessments, and implement technical improvements across PBCS components. The RSE is accountable for proper performance and mission success of the PBCS, resisting inappropriate...
Lockheed Martin
May 15, 2026
Systems Engineering Manager
Lockheed Martin Littleton, CO
Description: "Ahead of Ready" 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 highly skilled and motivated Systems Engineering Manager to join the Space Protection Programs team within the National Security Space (NSS) Line of Business. The Chief Systems Engineer and Functional Talent Center Leader will work closely with the Chief Engineer team on a development program within the Space...
Lockheed Martin
May 23, 2026
Senior Electrical Engineer (Level III) - Top Secret Clearance
Lockheed Martin Littleton, CO
Description: Position details: Location: Littleton, CO Work Schedule: 9x80 Position type: Full-time onsite (this is not a hybrid position) 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...
LMI
Feb 02, 2026
Senior Full-Stack Software Engineer - TS Clearance Required
LMI Colorado Springs, CO
Overview LMI is actively seeking a skilled, experienced Senior Full-Stack Software Engineer to join our team in Colorado Springs, CO. This role involves working directly with USSF and US Government customers, as well as analytical partners, to translate wargame, exercise, training, and analytic needs into responsive, high-performance software applications within LMI’s Modeling, Simulation, Prototyping, Wargaming, & Analysis platform, RAPTR ® .   LMI is a new breed of digital solutions provider dedicated to accelerating government impact with innovation and speed. Investing in technology and prototypes ahead of need, LMI brings commercial-grade platforms and mission-ready AI to federal agencies at commercial speed.   Leveraging our mission-ready technology and solutions, proven expertise in federal deployment, and strategic relationships, we enhance outcomes for the government, efficiently and effectively. With a focus on agility and collaboration,...
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