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49 software engineer sr jobs found

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Security Clearance software engineer sr
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Lockheed Martin
Jun 09, 2026
Software Engineer Sr - Top Secret Clearance Required to Start
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. *** This position is contingent upon the program award expected in early 2026.*** Within...
Lockheed Martin
May 29, 2026
Software Engineer Sr
Lockheed Martin Herndon, VA
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. THE WORK Lockheed Martin's Paragon Program is seeking a talented level 3 Software Engineer with a TS/SCI clearance to work from either our King of Prussia, PA or Herndon, VA location(s) . This is an EARLY-MID CAREER (level 3) ROLE where candidates typically require 3+ years of experience and...
Lockheed Martin
May 29, 2026
Software Engineer Sr
Lockheed Martin Herndon, VA
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. THE WORK Lockheed Martin's Paragon Program is seeking a talented level 3 Software Engineer with a TS/SCI clearance to work from either our King of Prussia, PA or Herndon, VA location(s) . This is an EARLY-MID CAREER (level 3) ROLE where candidates typically require 3+ years of experience and...
Lockheed Martin
May 29, 2026
Software Engineer Sr. - (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.  Within LM Space, the Fishhooks Program is looking for a highly motivated individual...
Lockheed Martin
May 23, 2026
Software Engineer Sr
Lockheed Martin Herndon, VA
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. We’re creating future-ready solutions, focusing on resiliency and urgency through our 21st Century Security® vision. THE WORK Lockheed Martin is seeking a talented level 3 Software Engineer with an active TS/SCI...
Lockheed Martin
May 01, 2026
Software Engineer Sr
Lockheed Martin Herndon, VA
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. THE WORK Lockheed Martin's Paragon Program is seeking a talented Software Engineer with a TS/SCI clearance to work from either our King of Prussia, PA or Herndon, VA location(s) . This is an EARLY-MID CAREER (level 3) ROLE where candidates typically require 3+ years of experience and a BS...
Lockheed Martin
Apr 30, 2026
Software Engineer Sr - Level 3 - (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.  Within LM Space, the Biscayne Program is looking for a highly motivated individual...
Lockheed Martin
Mar 24, 2026
Software Engineer Sr - Level 3 - Top Secret Clearance Required
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 the Victor Portfolio of Space Security, we are seeking a highly skilled,...
Lockheed Martin
Mar 17, 2026
Software Engineer Sr
Lockheed Martin Moorestown, NJ
Description: What We're Doing Lockheed Martin is shaping the future of defense through cutting edge radar and missile defense technologies, and we want you to help write the next chapter. As the premier developer of active electronically scanned array (AESA) radars and integrated air and missile defense solutions for the U.S. military, our allies, and more than 45 nations worldwide, we deliver world class situational awareness, early warning, and kill assessment capabilities in the most demanding environments. Join a global team of 35 000 engineers, software developers, and cyber experts who turn complex challenges into reliable, next generation systems that keep warfighters ahead of emerging threats. Your talent will power everything from space domain awareness to ground based radar testbeds, ensuring the safety of today’s forces and the security of tomorrow’s world. The Work The Lockheed Martin Rotary & Mission Systems Software Engineer will have the opportunity to...
General Dynamics Mission Systems, Inc
Jun 16, 2026
NC3 Sr Advanced Software Engineer
General Dynamics Mission Systems, Inc Dedham, MA
Basic Qualifications Bachelor's degree in Software Engineering, or related Science, Technology, Engineering or Mathematics field, plus a minimum of 8 years of relevant experience; or Master's degree, plus 6 years relevant experience.   CLEARANCE REQUIREMENTS:   Department of Defense Top Secret security clearance is required at time of hire. Applicants selected will be subject to a U.S. Government security investigation and must meet eligibility requirements for access to classified information. Due to the nature of work performed within our facilities, U.S. citizenship is required. Responsibilities for this Position ROLE AND POSITION OBJECTIVES: As a software engineer for the NC3 business segment, you’ll be a member of a cross functional team responsible for design, development and test of the next generation of Strategic Systems.   We encourage you to apply if you have any of these preferred skills or...
General Dynamics Mission Systems, Inc
Mar 24, 2026
Sr Advanced Software Engineer - Top Secret Clearance Required
General Dynamics Mission Systems, Inc Dedham, MA
Basic Qualifications Requires a Bachelor’s degree in Software Engineering, or a related Science, Engineering, Technology or Mathematics field. Also requires 8+ years of job-related experience, or a Master's degree plus 6 years of job-related experience. Agile experience preferred.     CLEARANCE REQUIREMENTS: : Department of Defense Secret security clearance is required at time of hire. Applicants selected will be subject to a U.S. Government security investigation and must meet eligibility requirements for access to classified information. Due to the nature of work performed within our facilities, U.S. citizenship is required. Responsibilities for this Position ROLE AND POSITION OBJECTIVES: As a software engineer for the NC3 business segment, you’ll be a member of a cross functional team responsible for design, development and test of the next generation of Strategic Systems.   We encourage you to apply if you have...
Lockheed Martin
May 07, 2026
Senior Software Engineer / Embedded, Grand Prairie, TX
Lockheed Martin Grand Prairie, TX
Description: You will be the Senior Software Engineer Sr for the Lockheed Martin Missiles and Fire Control (MFC) team. Our team is responsible for designing, developing, and manufacturing precision engagement aerospace and defense systems for the U.S. and allied militaries. Lockheed Martin is a global security and aerospace company that employs approximately 114,000 people worldwide and is principally engaged in the research, design, development, manufacture, integration and sustainment of advanced technology systems, products and services. Lockheed Martin Missiles and Fire Control (MFC) is one of four Lockheed Martin business areas. MFC is a recognized designer, developer and manufacturer of precision engagement aerospace and defense systems for the U.S. and allied militaries. MFC develops, manufactures and supports advanced products for military customers that include the U.S. Army, Navy, Air Force, Marine Corps, NASA and dozens of foreign allies. MFC also offers a wide range...
Lockheed Martin
May 07, 2026
Software Engineer / Embedded, Grand Prairie, TX
Lockheed Martin Grand Prairie, TX
Description: You will be the Software Engineer Sr for the Lockheed Martin Missiles and Fire Control (MFC) team. Our team is responsible for designing, developing, and manufacturing precision engagement aerospace and defense systems for the U.S. and allied militaries. Lockheed Martin is a global security and aerospace company that employs approximately 114,000 people worldwide and is principally engaged in the research, design, development, manufacture, integration and sustainment of advanced technology systems, products and services. Lockheed Martin Missiles and Fire Control (MFC) is one of four Lockheed Martin business areas. MFC is a recognized designer, developer and manufacturer of precision engagement aerospace and defense systems for the U.S. and allied militaries. MFC develops, manufactures and supports advanced products for military customers that include the U.S. Army, Navy, Air Force, Marine Corps, NASA and dozens of foreign allies. MFC also offers a wide range of...
Lockheed Martin
May 07, 2026
Software Engineer Senior - Embedded, Dallas, TX
Lockheed Martin Grand Prairie, TX
Description: Lockheed Martin is a global security and aerospace company that employs approximately 114,000 people worldwide and is principally engaged in the research, design, development, manufacture, integration and sustainment of advanced technology systems, products and services. Lockheed Martin Missiles and Fire Control (MFC) is one of four Lockheed Martin business areas. MFC is a recognized designer, developer and manufacturer of precision engagement aerospace and defense systems for the U.S. and allied militaries. MFC develops, manufactures and supports advanced products for military customers that include the U.S. Army, Navy, Air Force, Marine Corps, NASA and dozens of foreign allies. MFC also offers a wide range of products and services for the global civil nuclear power industry and the military’s green power initiatives. As a Software Engineer at MFC, you will join one of the largest networks of software professionals, implementing cutting edge technologies on both...
Lockheed Martin
Apr 08, 2026
Software Engineer Senior - Embedded, Dallas, TX
Lockheed Martin Grand Prairie, TX
Description: Lockheed Martin is a global security and aerospace company that employs approximately 114,000 people worldwide and is principally engaged in the research, design, development, manufacture, integration and sustainment of advanced technology systems, products and services. Lockheed Martin Missiles and Fire Control (MFC) is one of four Lockheed Martin business areas. MFC is a recognized designer, developer and manufacturer of precision engagement aerospace and defense systems for the U.S. and allied militaries. MFC develops, manufactures and supports advanced products for military customers that include the U.S. Army, Navy, Air Force, Marine Corps, NASA and dozens of foreign allies. MFC also offers a wide range of products and services for the global civil nuclear power industry and the military’s green power initiatives. As a Software Engineer at MFC, you will join one of the largest networks of software professionals, implementing cutting edge technologies on both...
Lockheed Martin
Jun 04, 2026
Software Integration Engineer, Sr - GMD Weapons Systems (GWS)
Lockheed Martin Colorado Springs, CO
Description: What We're Doing Become a part of something IMPACT-ful! Ground Missile Defense (GMD) is the heart of the Missile Defense System and a key element of our nation’s defense against ballistic missile attacks. The GMD Weapon System (GWS) processes data from multiple sensors to identify and characterize the inbound ballistic missile threat, plans the best defensive solution, and launches the intercepting missiles to negate the threat. The Work The selected candidate will become part of the Ground-based Mid-course Defense (GMD) Weapon System (GWS) Contract in support of the Missile Defense Agency (MDA). The GMD Program is a critical part of the nations layered Ballistic Missile Defense System providing the US with the capability to engage and intercept long range ballistic missile threats during midcourse flight. The Ground Systems component of GMD provides the capability to process data received from radars and overhead sensors, communicate across a complex...
Lockheed Martin
Jun 04, 2026
Sr. Automated Software Test Engineer - GMD Weapons Systems (GWS)
Lockheed Martin Huntsville, AL
Description: What We're Doing Become a part of something IMPACT-ful! Ground Missile Defense (GMD) is the heart of the Missile Defense System and a key element of our nation’s defense against ballistic missile attacks. The GMD Weapon System (GWS) processes data from multiple sensors to identify and characterize the inbound ballistic missile threat, plans the best defensive solution, and launches the intercepting missiles to negate the threat. The Work The selected engineer will support a fast-pace, forward looking Software Development environment on the Architecture and Delivery (A&D) product team's Automated Test and Verification team, with tasking directed at Continuous Integration and Continuous Deliver (CI/CD). Who We Are Lockheed Martin is a global aerospace, defense, and security company dedicated to advancing scientific discovery and harnessing innovation to make the world a safer place. Our RMS business in Huntsville, AL is a hub of talented engineers,...
Lockheed Martin
May 29, 2026
Cyber Software Engineer Embedded, Sr - Top Secret Required
Lockheed Martin Grand Prairie, TX
Description: You will be a Cyber Software Engineer, EMBEDDED in the Program Protection Organization. Our organization oversees all aspects of Anti-Tamper and embedded Cybersecurity across Missiles and Fire Control. We are chartered with providing the skills and innovative technologies to develop, design, produce and sustain secure products across our Lines of Business. What You Will Be Doing As the Cyber Software Engineer you will be responsible for supporting a broad range of challenges in a dynamic team environment and the ability to work with Cyber Exploitation Engineers, Cyber System Security Engineers and system engineers across Lockheed Martin MFC to develop new exploitation software tools, and maintain current capabilities. Your responsibilities will include: • Leverage your technical, and interpersonal skills in a structured team framework and work in a cross-functional engineering Team environment. • Employ a high level of productivity and responsiveness,...
Lockheed Martin
May 28, 2026
Software Automated Test Engineer, Sr - GMD Weapons Systems (GWS)
Lockheed Martin Huntsville, AL
Description: What We're Doing Become a part of something IMPACT-ful! Ground Missile Defense (GMD) is the heart of the Missile Defense System and a key element of our nation’s defense against ballistic missile attacks. The GMD Weapon System (GWS) processes data from multiple sensors to identify and characterize the inbound ballistic missile threat, plans the best defensive solution, and launches the intercepting missiles to negate the threat. The Work The selected Principal Test Engineer responsibilities will include the support of the GWS-IDT IPT. You be responsible for scheduling the tests for execution and then will monitor, measure, control and report on the test progress, the product quality status and the test results, adapting the test plan and compensating as needed to adjust for evolving conditions. Who We Are Lockheed Martin is a global aerospace, defense, and security company dedicated to advancing scientific discovery and harnessing innovation to make the...
Lockheed Martin
May 06, 2026
Sr. Software Engineer- Secret Clearance
Lockheed Martin Colorado Springs, CO
Description: What We’re Doing Our team, Command and Control, Battle Management and Communications (C2BMC)- Global team at Lockheed Martin, is dedicated to engineering, developing, and integrating new capabilities for the Missile Defense System that protects the United States and its allies. While we are part of a large organization, we operate within smaller, agile teams in a fast-paced, dynamic environment. Our responsibilities include Sensor/Weapon Integration, Algorithm Development, User Interface Development, Automated Testing, Cyber Security, and enhancing critical missile defense technologies. The Work The role involves providing comprehensive analysis and technical support for a large, distributed Java‑based system. You will resolve complex problems across the full software lifecycle—design, development, testing, integration, and user support—while adhering to detailed specifications to modify or extend functionality within an extensive code base. Responsibilities...
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