Guidance, Navigation, & Control Engineer (senior, Level III) - Secret

GNC Sr Engineer

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.

Defending against modern missile threats on the Next Generation Interceptor (NGI) program requires constant collaboration and innovation. We integrate systems end to end to detect, control, and engage threats across every domain, investing in technologies like directed energy, space-based capabilities, and solid-state radar to create layers of defense. Shooting a missile down with a missile was once science fiction. We've made it a reality. Spotting enemy launches, identifying targets, calculating trajectories, launching interceptors, and guiding them to destroy threats—all within seconds—is complex work. Our culture supports bold ideas, technical excellence, and building a safer future.

As a GNC Sr Engineer, you will join the Simulation and Performance team on the Next Generation Interceptor (NGI) program. In this role, you will:

• Design, analyze, and optimize GN&C subsystem dynamics and control systems using MATLAB/Simulink, C++, and Python.
• Develop, verify, and integrate high-fidelity simulation models into 6-DOF C++ simulations, Matlab/Simulink environments, and Linux-based HPC or VM systems.
• Modify and build code in C++, C, Python, Fortran, Matlab/Simulink, Linux shell, and YAML, and create unit tests to ensure model and software quality.
• Support system integration, test, and verification activities to confirm subsystem performance meets program requirements.
• Work in an Agile DevOps environment leveraging Docker, containerization, and Kubernetes deployments.
• Collaborate with performance analysts, flight software teams, and customers throughout the program life cycle, including mission operations and post-launch performance assessments.

Successful applicants generally have at least 3+ years of related experience and may have a post-secondary degree or training in a related discipline, such as Aerospace Engineering or other related field.

Basic Qualifications:

• Skill Requirements:
• Professional experience in Modeling and Simulation with emphasis in Guidance, Navigation, and Control algorithms
• Experience with Matlab/Simulink and model development
• Experience in Python and C++
• Experience in one or more of the following: 1) Tactical flight software development, 2) Missile algorithm development, and/or 3) System performance analysis
• Security Clearance / Work Authorization:
• To meet requirements of the program/customer, this position requires the selected employee to be a U.S. Citizen.
• Qualified applicants must possess at minimum a currently Active Secret security clearance to be considered.
• 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
• Highly proficient with the following programming languages: Matlab, C++, C, Fortran 77, Python, Linux, YAML
• 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: Secret

Other Important Information You Should Know:

• Expression 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 off

Lockheed 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.