Senior Specialist, Systems Engineering - Security

L3Harris Technologies is seeking a Modeling & Simulation Engineer to support high-visibility national security space programs. This role focuses on developing and executing high-fidelity space mission simulations to evaluate spacecraft performance, mission resilience, and operational effectiveness in contested and dynamic environments. The selected candidate will apply astrodynamics, analytical modeling, and mission-focused simulation techniques to support operational planning, system performance analysis, mission protection, and digital engineering initiatives. Essential Functions: •Experience with orbital mechanics modeling and space mission analysis. •Develop, implement, and maintain high-fidelity space mission models and simulations supporting operational planning, performance analysis, and mission assurance activities. •Perform orbital mechanics modeling including orbit propagation, maneuver analysis, rendezvous and proximity operations (RPO), conjunction assessment, and/or covariance analysis. •Present technical findings, risk assessments, and analytical insights to program leadership and/or customer stakeholders. •Support exercise planning, wargaming activities, and mission rehearsal simulations as required. Qualifications: •Bachelor's degree and minimum 4 years of prior relevant experience. Graduate degree and a minimum of 2 years of prior related experience. 2 years experience with modeling tools such as STK, ODTK, GMAT, FreeFlyer, or Python-based analytical environments. Preferred Additional Skills: •Experience supporting Space Domain Awareness (SDA), Mission Protection, or national security space operations programs. •Experience supporting wargaming or operational exercises in coordination with Department of War (DoW) and Intelligence Community (IC) organizations, including U.Space Force and the National Reconnaissance Office (NRO). All applicants will be considered for employment without regard to race, color, religion, age, national origin, ancestry, ethnicity, gender (including pregnancy, childbirth, breastfeeding or other related medical conditions), gender identity, gender expression, sexual orientation, marital status, veteran status, disability, genetic information, citizenship status, characteristic or membership in any other group protected by federal, state or local laws. Please be aware many of our positions require the ability to obtain a security clearance. Security clearances may only be granted to U.S. citizens. By submitting your resume for this position, you understand and agree that L3Harris Technologies may share your resume, as well as any other related personal information or documentation you provide, with its subsidiaries and affiliated companies for the purpose of considering you for other available positions. Please click here for the E-Verify Poster in English or Spanish . For information regarding your Right To Work, please click here for English or Spanish .