Description: At Lockheed Martin, we apply our passion for purposeful innovation to keep people safe and solve the world's most complex challenges. We are seeking a talented Guidance, Navigation & Tracking Engineer to support the continued enhancement of the Patriot Advanced Capability-3 (PAC-3) interceptor missile and ground system.The PAC-3 family of missiles are the only combat proven Hit-to-Kill interceptors that defend against incoming threats, including tactical ballistic missiles, cruise missiles, and aircraft through direct body-to-body contact delivering exponentially more kinetic energy on the target than can be achieved with blast-fragmentation kill mechanisms. Click https://www.lockheedmartin.com/en-us/products/pac3-mse.html to learn more about the PAC-3 MSE!What You Will Be DoingAs the GNC Engineer, you will impact everything from flight test prediction to integration & test. Your responsibilities will include but are not limited to: Support the integration, test, verification, and validation of the system and various subsystems, including ground system fire control algorithms, missile guidance, navigation and autopilot algorithms, and actual Operational Flight Program code with C and FORTRAN models of weapons, sensors, ground systems, and environments through the 6-Degree of Freedom (6-DOF) Integrated Flight Simulations (IFS), Hardware In-the-Loop (HWIL) Lab and actual flight tests. Participate in flight test prediction and data performance analysis for multiple flights. Work with a team to develop robust algorithms to improve system performance. Support system performance assessments and trade studies.This role will require onsite support full-time at Lockheed Martin’s Missiles and Fire Control headquarters in Grand Prairie, TX working a 4/10 Flex schedule. This position requires a current DoD Secret clearance, therefore, U.S. citizenship is required.Why Join UsFrom onsite to remote, we offer flexible work schedules to comprehensive benefits investing in your future and security, Learn more about Lockheed Martin’s comprehensive benefits package here.Our Commitment to Diversity and InclusionWe Hear You, We See You. At Lockheed Martin, we invest in people and promoting the sharing of ideas to create incredible solutions. We know that our success depends on the combined efforts of diverse thinkers like you! At Lockheed Martin, we cultivate an inclusive environment that appreciates differences and unique thinking.Our global commitment to diversity and inclusion reflects our values of doing what's right, respecting others, and performing with excellence. Learn more here: Global DEI.Basic Qualifications: Candidate must be a U.S. citizen. Willingness to work onsite in a classified area or lab environment Candidate must have a college degree in computer science, physics, computer engineering, mechanical engineering, electrical engineering, aerospace engineering, applied mathematics, or similar Candidate must be proficient in C Proficient in either Matlab or Python Candidate must have demonstrated the ability to perform one or more of the following Guidance, Navigation and Control (GNC) or Modeling and Simulation (M&S) assignments based on completed course work or professional experience:o Develop and analyze algorithms such as guidance, navigation, autopilot, inertial tracking, and servo control algorithmso Develop and/or verify/validate complex vehicle models and simulations such as missile 6-degree-of-freedom simulationso Demonstrate strong math skills in the areas of linear algebra, matrix math, statistics, trigonometry, and coordinate transformations Strong written/verbal communication and organizational and interpersonal skillsDesired Skills: Proficiency with Python and Linux Experience with Agile development Ability to perform preflight system performance assessment and post flight verification analyses Experience designing and analyzing target tracking and terrestrial navigation systems Experience with optimal state estimation filters such as extended Kalman filters (EKF) Demonstrated skills in probability, statistics, and Design of Experiments (DOE) Experience with Model-based systems engineering (MBSE) Experience deploying algorithms that satisfy real-time performance requirements Experience with DevOps/DevSecOps CI/CD pipelines and software version control such as GitSecurity Clearance Statement: This position requires a government security clearance, you must be a US Citizen for consideration.Clearance Level: Secret with Investigation or CV date within 5 yearsOther 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: 4x10 hour day, 3 days off per weekLockheed Martin is an Equal Opportunity/Affirmative Action Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, gender identity, national origin, age, protected veteran status, or disability status.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: MISSILES AND FIRE CONTROLRelocation Available: PossibleCareer Area: Guidance, Navigation and ControlType: Full-TimeShift: First