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45 software test engineer jobs found in King of Prussia

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Lockheed Martin
Aug 08, 2026
Software Engineer - Level 2
Lockheed Martin King of Prussia, PA
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. • Generating and simulating operational level plans to explore the art of the possible,...
Lockheed Martin
Jul 29, 2026
Staff Software Engineer - Level 4
Lockheed Martin King of Prussia, PA
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. • Generating and simulating operational level plans to explore the art of the possible,...
Lockheed Martin
Jul 28, 2026
Software Engineer Sr - Level 3 (Top Secret)
Lockheed Martin King of Prussia, PA
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. • Generating and simulating operational level plans to explore the art of the possible,...
Lockheed Martin
Jul 23, 2026
Software Engineer - Level 2
Lockheed Martin King of Prussia, PA
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. • Generating and simulating operational level plans to explore the art of the possible,...
Lockheed Martin
Jul 23, 2026
Software Engineer Sr - Level 3
Lockheed Martin King of Prussia, PA
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. • Generating and simulating operational level plans to explore the art of the possible,...
Lockheed Martin
Jul 22, 2026
Staff Software Engineer - Level 4
Lockheed Martin King of Prussia, PA
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. • Generating and simulating operational level plans to explore the art of the possible,...
Lockheed Martin
Jul 18, 2026
Senior Network Communications Engineer - EADGE-T EXPAT UAE
Lockheed Martin King of Prussia, PA
Description: PLEASE NOTE: THIS POSITION REQUIRES A FULL-TIME EXPATRIATE ASSIGNMENT IN THE UNITED ARAB EMIRATES (UAE) FOR APPROXIMATELY 3 TO 4 YEARS. WHAT WE'RE DOING Join the EADGE-T team and help modernize an integrated air and missile defense and air battle management capability for the United Arab Emirates. As part of the EADGE-T UAE Tech Refresh , you'll support hardware modernization and foundational cybersecurity enhancements while helping deliver the next generation of this mission-critical system. Working alongside an international customer, you'll help develop and deploy secure communications infrastructure supporting one of Lockheed Martin's premier international defense programs. THE WORK As a Level 3 Network Communications Engineer, you'll design, integrate, secure, and optimize high-performance communications networks supporting mission-critical air and missile defense operations. Working with systems, software, cybersecurity, hardware, and integration...
Lockheed Martin
Jul 18, 2026
Staff Network Communications Engineer - EADGE-T EXPAT UAE
Lockheed Martin King of Prussia, PA
Description: PLEASE NOTE: THIS POSITION REQUIRES A FULL-TIME EXPATRIATE ASSIGNMENT IN THE UNITED ARAB EMIRATES (UAE) FOR APPROXIMATELY 3 TO 4 YEARS. WHAT WE'RE DOING Join the EADGE-T team and help modernize an integrated air and missile defense and air battle management capability for the United Arab Emirates. As part of the UAE Tech Refresh , you'll support hardware modernization and foundational cybersecurity enhancements while helping deliver the next generation of this mission-critical system. Working alongside an international customer, you'll help develop and deploy secure communications infrastructure supporting one of Lockheed Martin's premier international defense programs. THE WORK As a Staff Network Communications Engineer, you'll lead the design, integration, security, and optimization of high-performance communications networks supporting mission-critical air and missile defense operations. Working across systems, software, cybersecurity, hardware, and...
Lockheed Martin
Jul 18, 2026
Senior Software Engineer - EADGE-T Tech Refresh - EXPAT UAE
Lockheed Martin King of Prussia, PA
Description: PLEASE NOTE: THIS POSITION REQUIRES A FULL-TIME EXPATRIATE ASSIGNMENT IN THE UNITED ARAB EMIRATES (UAE) FOR APPROXIMATELY 2 TO 3 YEARS. WHAT WE'RE DOING Join the EADGE-T team and help modernize an integrated air and missile defense and air battle management capability for the United Arab Emirates. As part of the UAE Tech Refresh , you'll support hardware modernization and foundational cybersecurity enhancements while helping deliver the next generation of this mission-critical system. Working alongside an international customer, you'll help develop and deploy advanced software capabilities supporting one of Lockheed Martin's premier international defense programs. THE WORK As a Senior Software Engineer, you'll design, develop, integrate, and test software solutions supporting mission-critical air and missile defense capabilities. Working in an Agile development environment, you'll collaborate with cross-functional engineering teams to deliver new...
Lockheed Martin
Jul 16, 2026
Software Engineer Sr - Level 3
Lockheed Martin King of Prussia, PA
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. • Generating and simulating operational level plans to explore the art of the possible,...
Lockheed Martin
Jul 16, 2026
Software Engineer Sr - Level 3
Lockheed Martin King of Prussia, PA
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. • Generating and simulating operational level plans to explore the art of the possible,...
Lockheed Martin
Jul 14, 2026
Systems Engineer SEIT Lead
Lockheed Martin King of Prussia, PA
Description: WHO WE ARE: Lockheed Martin Rotary and Mission Systems has an opportunity for a Systems Engineering Integration and Test (SEIT) Lead for operational systems within the Ground Cyber Electronic Warfare portfolio. The successful candidate will be an engineering leader to oversee operations and maintenance for complex software-defined RF system installations in OCONUS/CONUS locations. Ability to travel to OCONUS locations several times throughout the year is desired for this position. THE WORK: The SEIT Lead would maintain and enhance the engineering baseline, develop testing strategies for upgrades, and oversee the change management process including chairing engineering review boards. The candidate must develop a deep technical knowledge of all aspects of the system architecture in order to identify change impacts due to obsolescence as well as guide paths to expanded capabilities for growth opportunities. As a technical leader, the candidate will be a primary...
Lockheed Martin
Jul 08, 2026
Senior Software Engineer (Top Secret Clearance)
Lockheed Martin King of Prussia, PA
Description: Lockheed Martin’s Victor Portfolio of Space Security is seeking a highly skilled, motivated, and experienced Senior Software Engineer to join an Agile, cross‑functional team dedicated to protecting critical space assets. This role will focus on developing web‑based applications within an open‑architecture infrastructure that supports mission‑critical space‑security operations. The successful candidate will collaborate with internal development teams and subject‑matter experts, and thrive in a fast‑paced environment where each day brings new challenges. Key Responsibilities • Full‑Lifecycle Development – Design, implement, test, deploy, and maintain web applications and services that enable space‑asset protection. • Agile Collaboration – Participate in Scrum ceremonies (stand‑ups, sprint planning, retrospectives) and contribute to continuous‑improvement of team processes. • Open‑Architecture Integration – Build modular, reusable components that conform to...
Lockheed Martin
Jul 03, 2026
Systems Engineer
Lockheed Martin King of Prussia, PA
Description: WHO WE ARE: Lockheed Martin Rotary and Mission Systems has an opportunity in Valley Forge, PA for a Systems Engineer supporting the supporting the Ground Cyber Electronic Warfare portfolio. As a new hire on our team, you can help us take on the world’s most important and complex challenges by providing innovative solutions to a variety of missions. In this important role, you will collaborate with a diverse team of technical professionals, interact with internal stakeholders, and interface with external customers. The successful candidate will be motivated, dedicated, detail-focused, and team-oriented. WHO YOU ARE We are seeking a motivated and experienced Associate Systems Engineer to join our team. • Contributor to the creation of design solutions that address complex engineering problems across the full system lifecycle. • Develop system requirements and architectures to ensure customer needs and contracts are appropriately translated into the products...
Lockheed Martin
Jul 02, 2026
Staff Software Engineer - Level 4 (TS/SCI)
Lockheed Martin King of Prussia, PA
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're seeking a talented and motivated Senior Software Engineer to join our fast-paced...
Lockheed Martin
Jul 02, 2026
Senior Software Engineer - Level 3 (TS/SCI with Poly)
Lockheed Martin King of Prussia, PA
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're seeking a talented and motivated Senior Software Engineer to join our fast-paced...
Lockheed Martin
Jun 24, 2026
Cyber Systems Security Engineer Sr
Lockheed Martin King of Prussia, PA
Description: Cyber Systems Security Engineer (CSSE) – TTWCS Program What We're Doing At Lockheed Martin Rotary and Mission Systems, we are shaping the future of defense and security through innovation, integrity, and visionary thinking. Our teams apply the highest standards of business ethics and technical expertise to design solutions that safeguard our nation and allies. Every day, we push boundaries to ensure mission success—and we invite you to be part of this critical work. The Work As a Cyber Systems Security Engineer (CSSE) supporting the TTWCS program, you will: Perform periodic manual and automated STIG evaluations, tracking deltas across versions and platforms. Conduct cyber risk assessment activities, including threat modeling, vulnerability analysis, and evaluation of mitigation strategies. Develop, analyze, and validate security AI design constraints within the cyber domain. Collaborate with cybersecurity engineers, system architects, and developers to...
Lockheed Martin
Jun 19, 2026
Systems Engineer
Lockheed Martin King of Prussia, PA
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. • Within LM Space, the Echo Program Area is looking for a highly motivated individual to...
Lockheed Martin
Jun 19, 2026
Systems Engineer
Lockheed Martin King of Prussia, PA
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. • Within LM Space, the Echo Program Area is looking for a highly motivated individual to...
Lockheed Martin
Jun 19, 2026
Sr Mass Properties Engineer
Lockheed Martin King of Prussia, PA
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. Mass Properties Engineering is the art and science of predicting the mass properties of...
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