Senior Software Engineer - Level 3 (TS/SCI with Poly)

Reference: 730334BRPosted: 2026-05-29Location: King of Prussia, PennsylvaniaClearance: TS/SCI w/PolyCompany: Lockheed MartinDescription: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 youWe're seeking a talented and motivated Senior Software Engineer to join our fast-paced development effort and contribute to the success of a very challenging and rewarding mission. In this position you will:• Collaborate with an exceptional team of engineers implementing solutions and developing new features for satellite mission planning• Design, develop & demonstrate software capabilities to both internal and external partners• Participate in daily scrums, software sprint/release planning, demos, and retrospectives.Basic Qualifications:• Bachelor's degree in a related discipline, such as Computer Science, Software Engineering, Applied Physics, or other engineering disciplines or equivalent experience • Experience in software design, problem solving, and troubleshooting with the ability to independently design software solutions to address complex problems.• Experience in satellite mission planning and the software design & implementation of mission planning algorithms• Experience in software development using programming languages such as C# or Java• Experience working in Agile teams• Active TS/SCI with a favorably Poly security clearance to start. (Must be a US citizen)Desired Skills:• Knowledge of Orbital Dynamics• Full development lifecycle experience • Experience with GitLab CI/CD - Deployment pipelines, automated build, and/or configuration tools#LMSpaceSoftwareEng#SpaceSecurity#SpaceNSSSecurity Clearance Statement: This position requires a government security clearance, you must be a US Citizen for consideration.Clearance Level: TS/SCI w/PolyOther Important Information You Should KnowExpression of Interest: By applying to this job, you are expressing interest in this position and could be considered for other career opportunities where similar skills and requirements have been identified as a match. Should this match be identified you may be contacted for this and future openings.Ability to Work Remotely: Onsite Full-time: The work associated with this position will be performed onsite at a designated Lockheed Martin facility.Work Schedules: Lockheed Martin supports a variety of alternate work schedules that provide additional flexibility to our employees. Schedules range from standard 40 hours over a five day work week while others may be condensed. These condensed schedules provide employees with additional time away from the office and are in addition to our Paid Time off benefits.Schedule for this Position: 9x80 every other Friday offLockheed Martin is an equal opportunity employer. Qualified candidates will be considered without regard to legally protected characteristics.The application window will close in 90 days; applicants are encouraged to apply within 5 - 30 days of the requisition posting date in order to receive optimal consideration.At Lockheed Martin, we use our passion for purposeful innovation to help 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, develop, 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. We place an emphasis on empowering our employees by fostering an inclusive environment built upon integrity and corporate responsibility.If this sounds like a culture you connect with, you’re invited to apply for this role. Or, if you are unsure whether your experience aligns with the requirements of this position, we encourage you to search on Lockheed Martin Jobs, and apply for roles that align with your qualifications.Experience Level: Experienced ProfessionalBusiness Unit: SPACERelocation Available: PossibleCareer Area: Software EngineeringType: Full-TimeShift: First