APEX TK is seeking a highly motivated and skilled Astrodynamics Engineer to join our team supporting a critical government client. This position offers the opportunity to work on cutting-edge projects within the aerospace domain. Responsibilities: • Work with our modeling and simulation team to conduct a wide variety of analyses in support of government satellite programs in all types of Earth orbits • Work with experts in astrodynamics, propulsion systems, launch trajectories, sensing, and High Performance Computing (HPC) • Opportunities to meet with and optionally present findings to local senior government customers • Use programming languages such as Python, C++, or others to leverage existing analysis tools and develop new ones • Conduct independent trade studies and technical assessments • Review and validate algorithms and results provided by external teams • Develop and present technical briefings • Depending on their interests and skills the applicant may work on one or more of: • Strategies for significant orbit changes • Multi-satellite Rendezvous and Proximity Operations (RPO) • Leverage Space Domain Awareness (SDA) sensor data to perform Orbit Determination on maneuvering satellite Required Qualifications: • 2-10 years of relevant experience. • Bachelor’s Degree in a STEM related field such as Engineering, Mathematics, Physics, Aerospace, Computer Science, etc. • Active Top Secret/SCI w/ CI Poly Clearance • Experience performing space-related engineering analysis (collecting, organizing, analyzing data) using one or more of the following: C++, Python, R, SQL, PostgreSQL, Linux, MATLAB, VBA, or STK • Ability to communicate findings and recommendations to internal and external customers • Solid understanding of orbital mechanics and space systems. • Experience with phenomenological models, including a demonstrated ability to model relevant physical phenomena and validate those models. Preferred Qualifications: • Master's degree in a STEM related field. • Experience with other simulation tools and programming languages.