Guidance, Navigation & Control Engineer III - Secret clearance

Reference: 730932BRPosted: 2026-06-01Location: Littleton, COSalary: $116,200 - $201,365Clearance: 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:Come join the growing Theater Strike Weapon System program portfolio, including Conventional Prompt Strike, Hypersonic Weapon Systems, Advanced Glide Systems, Hypersonic Payload Delivery systems, and other new and dynamic programs. In this role as a GNC engineer, 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 4+ years of related experience and may have a post‑secondary degree or training in a related discipline.Basic Qualifications:Skill Requirements:• Broad technical skills such as rigid body dynamics, control theory, and/or computer programming. • Proven experience using MATLAB and/or Simulink for simulation and analysis of feedback control systems, closed loop guidance, or navigation algorithms. • C/C++ programming experience• Demonstrate strong math skills in the areas of linear algebra, matrix math, statistics, trigonometry, and/or coordinate transformation. • Ability to clearly document analysis results in presentation slides and engineering memos • Ability to work in a fast-paced, collaborative team environment. Security 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 Final Secret clearance to be considered qualified. Final 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 with simulations and physics-based modeling • Experience with state estimation and navigation algorithms, including Extended Kalman Filters • Experience with kinematics using Euler Angles and Quaternions • Experience with autopilot design and linear stability analysis • Familiarity or experience with missile defense systems or fire control • Experience with C++ development and Gitlab • Experience with FORTRAN and 6DOF simulations • Experience with model based software development using Simulink (autocoding) • Experience with hardware and hardware subsystems for guidance navigation control• Excellent written and verbal communication skills • Strong interpersonal skills • Demonstrated ability as a team player to build consensus among peers and build effective relationships with team members. • Demonstrated communication skills with the ability to articulate complex technical issues to peers, management, subcontractors and customers.• Familiarity with agile software development• Distributed/parallel processingSecurity 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 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.Pay Rate: The annual base salary range for this position in most major metropolitan areas in California, Massachusetts, and New York is $116,200 - $201,365. 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.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