Own spacecraft power units from requirements through design, supplier management, verification, and acceptance. Design power electronics boards involving switching, protection, current limiting, conversion, interfaces, and fault handling. Perform part selection, schematic capture, worst-case and derating analysis, board bring-up, testing, and debugging. Manage supplier specifications and design reviews, support spacecraft electrical integration, and contribute to power budgets, grounding, EMI/EMC, and system architecture trades for a 15-year GEO mission.