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372 senior software engineer level 3 jobs found

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United States senior software engineer level 3
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Lockheed Martin
Jun 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 02, 2026
Senior Software Engineer, Level 3
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
Jun 02, 2026
Senior Software Engineer, Level 3 - Clearance Required
Lockheed Martin Houston, TX
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 full time Software Engineer. In this role, you will...
Lockheed Martin
May 27, 2026
Senior Software Engineer, Level 3
Lockheed Martin Houston, TX
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 full time Software Engineer. In this role, you will...
Lockheed Martin
May 27, 2026
Senior Software Engineer, Level 3
Lockheed Martin Houston, TX
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 full time Software Engineer. In this role, you will...
Lockheed Martin
May 23, 2026
Senior Software Engineer – Level 3
Lockheed Martin Fort Worth, TX
Description: The Fusion team is looking for an experienced C++ developer to join our simulation team. In this role you will integrate third‑party models and build detailed simulations for our testing environment, ensuring the Fusion product is delivered efficiently and with the highest quality. The ideal candidate demonstrates excellent problem‑solving abilities, a collaborative mindset, and a proven capacity to work independently. What’s In It For You: From onsite to remote, we offer flexible work schedules to comprehensive benefits investing in your future and security, Learn more about Lockheed Martin’s comprehensive benefits package here. Do you want to be part of a company culture that empowers employees to think big, lead with a growth mindset, and make the impossible a reality? We provide the resources and give you the flexibility to enable inspiration and focus -if you have the passion and courage to dream big, work hard, and have fun doing what you love then we...
Lockheed Martin
May 01, 2026
Senior Software Engineer, Level 3 - Embedded - 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 01, 2026
Senior Software Engineer, Level 3 - Embedded - 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
Apr 28, 2026
Senior Software Engineer, Level 3 - Clearance Required
Lockheed Martin Houston, TX
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 full time Software Engineer. In this role, you will...
Lockheed Martin
Jun 10, 2026
Software Quality Engineer Senior- Level 3
Lockheed Martin Fort Worth, TX
Description: In this position, you will be Responsible for implementing the Software Quality Engineering (SWQE) mission to ensure programs have and are compliant to documented processes which meet customer and company requirements and are capable of producing quality software products. The successful applicant will do this, with limited supervision, by performing process, product, supplier, special quality evaluations/audits, and test verification/validation oversight throughout the software development lifecycle as well as using quality sciences to identify, communicate and drive to resolution needed improvements to software development processes and activities. They will provide SWQE management with metrics, reports, schedules, Basis of Estimates (BOEs) for tasking and other support as necessary. SWQE will develop and deploy standard software quality procedures and quality engineering methods and instruments. They must be willing to travel, ability to work off-shift and...
Lockheed Martin
Jun 10, 2026
Air Vehicle Health Management / IVHM Systems Engineer Senior - Level 3
Lockheed Martin Fort Worth, TX
Description: You will be the Air Vehicle Health Management / IVHM Systems Engineer Senior - Level 3 for the Diagnostics, Prognostics, and Health Management (DPHM) Team which is responsible for designing and maintaining diagnostic and prognostic capabilities that detect and isolate root‑cause failures in air vehicles. What You Will Be Doing As the Air Vehicle Health Management / IVHM Systems Engineer Senior - Level 3 you will be responsible for advancing the DPHM capability across the vehicle systems Directorate. Your responsibilities will include: Design, model, and integrate diagnostic and prognostic functions for aircraft systems and sub‑systems. Conduct testability, built‑in‑test (BIT), and FMECA analyses to define fault‑detection and failure‑isolation requirements. Evaluate operational DPHM performance, identify maturation opportunities, and recommend corrective actions. Coordinate schedules, work plans, and integration activities with...
Lockheed Martin
Jun 10, 2026
Systems Engineer- Level 3
Lockheed Martin Fort Worth, TX
Description: You will be the Systems Engineer for the Vehicle Systems Engineering – Production Liaison Team which is responsible for bridging Vehicle Systems Engineering and Production on the F‑35 program. What You Will Be Doing As the Systems Engineer you will be responsible for ensuring seamless technical communication and problem‑resolution between design and production. Your responsibilities will include: Collaborate with senior engineers to troubleshoot and resolve technical issues on production aircraft. Lead Root Cause Corrective Action (RCCA) investigations for production and fleet anomalies. Coordinate and lead test events on production aircraft to support development and certification activities. Update and maintain 3D CAD models and 2D drawings, adhering to drafting standards and configuration‑management protocols. Develop and manage MBSE models and requirements using SysML and IBM DOORS to ensure traceability and system integrity....
Lockheed Martin
Jun 10, 2026
Embedded Software Engineer Sr.
Lockheed Martin Bothell, WA
Description: What We're Doing At Lockheed Martin, we bring together people who are passionate about purposeful innovation to help keep people safe and solve some of the world's most complex challenges. Within Rotary & Mission Systems, the Laser & Sensor Systems (L&SS) team develops advanced High Energy Laser (HEL) technologies that support critical missions and next-generation defense capabilities. The Work Lockheed Martin Rotary & Mission Systems is seeking a Senior Embedded Software Engineer to join the L&SS team. In this role, you will contribute to the design, analysis, testing, and requirements verification of High Energy Laser systems. You will collaborate with multidisciplinary engineering teams to develop and validate software solutions that support advanced laser and sensor technologies. Key responsibilities include: Designing and developing embedded software solutions for HEL systems. Performing software analysis, testing, and verification...
Lockheed Martin
Jun 10, 2026
Reliability Engineer Staff
Lockheed Martin Orlando, FL
Description: You will be the Senior Reliability Engineer for the Reliability & Durability Team. Our team safeguards product performance by identifying hidden failure risks, designing accelerated life test programs, and delivering data driven mitigation strategies that keep our systems on track from concept through field service. What You Will Be Doing As the Senior Reliability Engineer you will be responsible for leading Failure Modes, Effects, and Criticality Analyses (FMECA) on parts and sub assemblies, and for creating test plans that use accelerated aging models to prove reliability and lifecycle durability. You will work hand in hand with design engineers, material scientists, test labs, and program managers to surface risks early, quantify them accurately, and drive corrective actions. Your responsibilities will include: • Develop and maintain component level FMECA worksheets that comply with MIL STD 1629A (or equivalent) and internal reliability standards. •...
Lockheed Martin
Jun 10, 2026
Software Engineer (level 2)
Lockheed Martin Palmdale, CA
Description: WHO WE ARE The Skunk Works (Lockheed Martin Advanced Development Programs) is looking for world-class talent in Software Engineering to be a part of a team that will carry on our 80-year tradition-making history in advanced aircraft development. The vehicle management software team writes software for a wide range of aircraft subsystems that make an airplane fly. We are a highly innovative fast paced team working developing modular and reusable software to support both our current platforms and the aircraft of the future. WHAT’S IN IT FOR YOU 3-day weekend every weekend! 4-10 Mon-Thursday option + Flexible Schedules This team is working new development software where our team members get to work hands on from the lab to the aircraft in all stages of development, including design, code, integration, and lab and field test. We work on a wide range of technologies and give our team members the opportunity to drive their career towards their area of interest. You...
Lockheed Martin
Jun 10, 2026
Systems Engineer- Early Career
Lockheed Martin Orlando, FL
Description: By bringing together people that use their passion for purposeful innovation, at Lockheed Martin we keep people safe and solve the world's most complex challenges. Our people are some of the greatest minds in the industry and truly make Lockheed Martin a great place to work. With our employees as our priority, we provide diverse career opportunities designed to propel development and boost agility. Our flexible schedules, competitive pay, and comprehensive benefits enable our employees to live a healthy, fulfilling life at and outside of work. At Lockheed Martin, we place an emphasis on empowering our employees by fostering innovation, integrity, and exemplifying the epitome of corporate responsibility. Lockheed Martin Rotary & Mission Systems is seeking a full-time Early Career Systems Engineer. The position is an I&T engineer responsible for planning, executing and debriefing daily lab sessions during single-ship or multi-ship F-35A/B/C simulator test...
Lockheed Martin
Jun 10, 2026
Senior System Safety Engineer
Lockheed Martin Mount Laurel Township, NJ
Description: WHO WE ARE At Lockheed Martin Rotary and Mission Systems, we are driven by innovation and integrity. We believe that by applying the highest standards of business ethics and visionary thinking, everything is within our reach – and yours as a Lockheed Martin employee. Lockheed Martin values your skills, training, and education. Come and experience your future! WHAT WE'RE DOING An engineer working in the System Safety Engineering group will contribute to a wide variety of projects based on our business needs. The role involves working as an independent contributor alongside team leadership to perform Systems Safety Engineering tasks in support of project objectives. As a Senior System Safety Engineer, you will be part of a team of experienced safety and specialty engineers working on various missile launching system programs. Your primary responsibility will be to contribute to analysis and design support efforts for all aspects of the system safety programs,...
Lockheed Martin
Jun 10, 2026
System Safety Engineer
Lockheed Martin Mount Laurel Township, NJ
Description: WHO WE ARE At Lockheed Martin Rotary and Mission Systems, we are driven by innovation and integrity. We believe that by applying the highest standards of business ethics and visionary thinking, everything is within our reach – and yours as a Lockheed Martin employee. Lockheed Martin values your skills, training, and education. Come and experience your future! WHAT WE'RE DOING An engineer working in the System Safety Engineering group will contribute to a wide variety of projects based on our business needs. The engineer will work as an independent contributor with team leadership to perform Systems Safety Engineering tasks in support of project objectives. THE WORK The engineer will join a group of experienced safety and specialty engineers working on various missile launching system programs. You will contribute to analysis and design support efforts for all aspects of the system safety programs on these products, ensuring that safety is crafted into the...
Lockheed Martin
Jun 10, 2026
Hub/ModStar Senior Software Engineer Staff / Full Stack / Orlando, FL
Lockheed Martin Orlando, FL
Description: You will be the Senior Software Engineer Full Stack for the Hub and ModStar team. Our team designs, develops, and sustains full‑stack applications that power critical MFC missions. What You Will Be Doing As the Senior Software Engineer Full Stack you will be responsible for delivering end‑to‑end software solutions while providing technical leadership to the Hub and ModStar teams. Your responsibilities will include, but are not limited to: Design, develop, and maintain full‑stack web applications from front‑end UI to back‑end services. Provide technical guidance and mentorship to team members, championing best practices and high‑quality code. Collaborate with cross‑functional stakeholders to translate requirements into scalable software designs. Own the CI/CD pipeline implementation and ensure secure, reliable deployments. Monitor performance, troubleshoot issues, and continuously improve application reliability and maintainability....
Lockheed Martin
Jun 09, 2026
Production Test Engineer Associate / Orlando, FL
Lockheed Martin Orlando, FL
Description: Lockheed Martin Missiles and Fire Control in Orlando, Florida is seeking a motivated Early Career Production Test Engineer to join our sensors team. You will support the testing of printed circuit board assemblies / circuit card assemblies (PCBAs / CCAs), electronic subsystems, and sensor pod level system testing, helping to maintain efficient production flows while learning best practices in test development and troubleshooting. In this hands-on role, you will work closely with production technicians, senior test engineers, design engineers, and quality teams to identify and resolve issues, improve test processes, and contribute to first-pass yield goals. Our team is responsible for ensuring the seamless operation of test systems, and you will play a key role in providing technical support, test equipment improvements, and troubleshooting expertise What You Will Be Doing As the Production Test Engineer, you will be responsible for supporting test systems,...
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