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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Software Engineer Sr - E3 - **Company:** Lockheed Martin - **Location:** Littleton, CO, United States - **Experience:** Expert - **Salary:** $110,300.0 - $204,900.0 - **Contract:** Permanent contract - **Skills:** Testing (Software), Java (Programming Language), Systems Engineering, C++ (Programming Language), Computer Programming, Continuous Delivery, Fortran (Programming Language), Python (Programming Language), MATLAB, Scrum Methodology, Simulation Software, Software Configuration Management, Software Engineering, Systems Integration, Data Processing, Gitlab, SC Clearance, Computer Equipment, Software Version Control - **Published:** September 1, 2026 - **Apply:** https://dejobs.org/x/x/FA331D98865F4DD59877983046BB77CC/job/ ## About the Role * Experience in simulation software development, software testing and validation, and software configuration management * Programming experience in one or more of the following: MATLAB, Fortran, C/C++, Python, Java US Citizenship required: Must have the ability to maintain a Secret Clearance. Must have a final secret clearance to start. Desired Skills * Knowledge of missile trajectory analysis and products * Experience programming in UNIX/LINUX operating system (O/S) environment * Knowledge of FORTRAN (or similar) * Strong programming experience (C/C++ or Similar) * Experience with automated build, test, continuous delivery and deployment * Experience with enterprise version control tooling such as Gitlab ## Description Plans, conducts, and coordinates software development activities. Designs, develops, documents, tests, and debugs software that contains logical and mathematical solutions to business/mission problems or questions in computer language for solutions by means of data processing equipment. Applies the appropriate standards, processes, procedures, and tools throughout the development life cycle. Applies knowledge of computer hardware and software, subject matter to be programmed in business/mission applications, information processing techniques used, and information gathered from system users to develop software. Corrects program errors, prepares operating instructions, compiles documentation of program development, and analyzes system capabilities to resolve questions of program intent, output requirements, input data acquisition, programming techniques, and controls. Ensures software standards are met., 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. The FBM Missile Performance group maintains and uses a collection of tools, scripts, and data to perform system level missile performance analyses and deliver data to a variety of internal and external stakeholders. As a Missile Performance Simulation Software Engineer, you will work with a team of engineers to maintain and modernize these tools, including performing the following functions: * Execute software development and programming in a team environment potentially supporting multiple projects or task orders supporting the maintenance, modernization and capability upgrades to multiple software products developed and sustained by this program * Support development of the architecture of the next generation of FBM Missile Performance simulation software * Participate in sprint planning, daily stand-ups, sprint reviews, and retrospectives to ensure timely delivery of software features * Analyze and solve complex software problems, working closely with team members to identify and implement solutions * Collaborate closely with analysts, project management, systems engineers, systems integration and test engineers as well as fellow software engineers US Citizenship required: Must have the ability to obtain an maintain a Top Secret Clearance. 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