Guidance, Navigation & Control Engineer III (Senior) - Top Secret

Reference: 724833BRPosted: 2026-07-15Location: Littleton, ColoradoSalary: $101,000 - $178,135Clearance: TS/SCI w/PolyCompany: 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 Team:Our Guidance, Navigation, and Control (GN&C) group challenges convention and drives innovation to transform how missions are executed. We design and develop the hardware, algorithms, and software that enable precision control of complex systems in demanding, zero-gravity environments. Through digital modernization, advanced analytics, and emerging technologies, we push the boundaries of national security and defense.While much of the work on this program remains classified, you will play a key role in developing end-to-end solutions that deliver tangible impact. You’ll collaborate with some of the brightest minds in engineering to design, integrate, and deploy pioneering capabilities that shape the future of our mission.About the Role:In this role, you will contribute to the design, analysis, and testing of guidance, navigation, and control systems that enable spacecraft to operate in complex space environments. You’ll collaborate closely with multidisciplinary teams to develop robust, flight-proven GN&C solutions and ensure mission success through rigorous simulation and validation.What You Will Be Doing:• Perform spacecraft controls design, analysis, simulation, and testing activities.• Develop and validate GN&C algorithms and flight software.• Utilize simulation and programming tools (e.g., MATLAB/Simulink, C++, Python).• Apply Kalman Filtering and Attitude Determination techniques to mission design.• Support hardware integration and mission operations in a dynamic, team-oriented environment.Successful applicants will generally possess a minimum of 3+ years of related experience and may have a post-secondary degree or training in a related discipline.Successful completion of customer required Polygraph Examination with favorable results is required for long term employment on this program.Basic Qualifications:Skill Requirements:• Strong experience in spacecraft controls design, analysis, simulation, and test.• Experience with simulation and programming tools such as MATLAB/Simulink, C++, Python.• Experience with Kalman Filtering and Attitude Determination.Security Clearance / Work Authorization:• To meet requirements of the program/customer, this position requires the selected employee to be a U.S. Citizen.• Active Top Secret security clearance is required prior to start, and necessary for consideration• Top Secret security clearance with adjudicated SCI (i.e. TS/SCI) is required for long term employment on this program. • Selected candidates must be willing to consent to Polygraph Examination, receiving favorable results, as required by our end customer.Desired Skills:• Active TS/SCI clearance with CI Poly.• Experience with flight software development and autocode to C++. • Jitter analysis experience (highly desired). • Familiarity with a GN&C hardware suite for space applications. • Mission operations experience. • Ability to work in a fast-paced, dynamic, collaborative team environment. • Strong communication skills with the ability to articulate complex technical issues to peers, management, subcontractors, and customers.Security 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 offPay Rate: The annual base salary range for this position in California, Massachusetts, and New York (excluding most major metropolitan areas), Colorado, Hawaii, Illinois, Maryland, Minnesota, New Jersey, Vermont, Washington or Washington DC is $101,000 - $178,135. For states not referenced above, the salary range for this position will reflect the candidate’s final work location. Please note that the salary information is a general guideline only. Lockheed Martin considers factors such as (but not limited to) scope and responsibilities of the position, candidate's work experience, education/ training, key skills as well as market and business considerations when extending an offer.Benefits offered: Medical, Dental, Vision, Life Insurance, Short-Term Disability, Long-Term Disability, 401(k) match, Flexible Spending Accounts, EAP, Education Assistance, Parental Leave, Paid time off, and Holidays. (Washington state applicants only) Non-represented full-time employees: accrue at least 10 hours per month of Paid Time Off (PTO) to be used for incidental absences and other reasons; receive at least 90 hours for holidays. Represented full time employees accrue 6.67 hours of Vacation per month; accrue up to 52 hours of sick leave annually; receive at least 96 hours for holidays. PTO, Vacation, sick leave, and holiday hours are prorated based on start date during the calendar year.This position is incentive plan eligible.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.Experience Level: Experienced ProfessionalBusiness Unit: SPACERelocation Available: PossibleCareer Area: Guidance, Navigation and ControlType: Full-TimeShift: First