Senior Specialist, Systems Engineer - Modeling and Simulation

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.
• Develop and execute threat-informed simulation scenarios incorporating adversary capabilities, red vs blue modeling, and Space Domain Awareness (SDA) considerations.
• 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. In lieu of a degree, minimum of 8 years of prior related experience.
• Top Secret/SCI with CI Poly required.
• 2 years of experience demonstrating the ability to translate operational requirements into executable simulation architectures.
• 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), Miss