• Generate, run, and refine thermo‑fluids models of cryogenic propellant systems including Reaction Control Systems, cryogenic fluids and Helium systems used in spacecraft. • Provide engineering guidance on hardware configuration, mission concept of operations (ConOps), and control logic optimization. • Quantitatively evaluate design alternatives, perform trade studies, and present data‑driven recommendations to engineering leadership. • Collaborate with a multidisciplinary team to advance the state‑of‑the‑art in in‑space cryogenic fluid management technologies.