Guidance, Navigation & Control Engineer (Level II)

Reference: 728240BRPosted: 2026-07-28Location: Huntsville, AlabamaClearance: SecretCompany: Lockheed MartinDescription:About Lockheed Martin Space: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 youAbout the Role:As a GNC Engineer, you will join the GN&C team on the Next Generation Interceptor (NGI) program. In this role, you may be involved in many of the following activities:• Apply missile guidance, navigation, and control expertise to algorithm development, signal and data processing, modeling, and simulation • Integrate MATLAB/Simulink models into a 6-DOF C++ simulation • Develop high fidelity models and simulation software • Develop new source code in C++ and Python • Modify code in C++, C, MATLAB, Simulink, Fortran, Python, Linux shell, and YAML • Create unit tests • Implement simulation software on a high performance computing cluster including Linux systems or VMs • Work in an Agile DevOps environment with Docker/Container and Kubernetes deployment • Collaborate with the performance critical thinkers, Flight Software team, and customer Successful applicants generally have a minimum of 2+ years of related experience and may have a post‑secondary degree or training in a related discipline.This position allows for work to be performed in the following locations:• Huntsville, ALBasic Qualifications:Skill Requirements:• Professional experience in modeling and simulation for Guidance, Navigation, and Control (GNC) systems, including algorithm development• Experience programming in Python and/or C++• Experience using MATLAB and/or Simulink for model development, simulation, or analysis• Experience in missile, tactical flight, or aerospace systems involving software development, algorithm development, or system performance analysisSecurity Clearance / Work Authorization:• To meet requirements of the program/customer, this position requires the selected employee to be a U.S. Citizen.• Applicants must be able to obtain Interim Secret clearance to be considered qualified. • Interim Secret clearance is required to prior to start.• Selected candidates will be required to maintain a minimum level, government issued Secret clearance for long term employment on this program.Desired Skills:• Experience working in the development phase of a missile defense program on modeling and simulation or software• Experience with GitLab, gcovr, gtest, Digital.ai Agility (VersionOne), Clang, Jira, or other Agile and DevOps tools• Experience implementing real-time simulation in a hardware-in-the-loop laboratory• Proficient with the following programming languages: Matlab, C++, C, Fortran 77, Python, Linux, YAML• Experience implementing real-time simulation in a hardware-in-the-loop laboratory• Experience with some of the following: image and sensor processing algorithms, target tracking algorithms, physics-based modeling or electro-optical sensors• HWIL and hardware/software integration experience• Experience with model based software development using Simulink (autocoding) and Gitlab• Excellent written and verbal communication skills• Strong interpersonal skills• Ability to work in a fast-paced, collaborative team environment.• Demonstrated ability as a team player to build consensus among peers and build effective relationships with team members.Security Clearance Statement: This position requires a government security clearance, you must be a US Citizen for consideration.Clearance Level: SecretOther 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.Join us at Lockheed Martin, where your mission is ours. Our customers tackle the hardest missions. Those that demand extraordinary amounts of courage, resilience and precision. They’re dangerous. Critical. Sometimes they even provide an opportunity to change the world and save lives. Those are the missions we care about.As a leading technology innovation company, Lockheed Martin’s vast team works with partners around the world to bring proven performance to our customers’ toughest challenges. Lockheed Martin has employees based in many states throughout the U.S., and Internationally, with business locations in many nations and territories.Experience Level: Experienced ProfessionalBusiness Unit: SPACERelocation Available: PossibleCareer Area: Guidance, Navigation and ControlType: Full-TimeShift: First