About Rivian Rivian is on a mission to keep the world adventurous forever. This goes for the emissions-free Electric Adventure Vehicles we build, and the curious, courageous souls we seek to attract. As a company, we constantly challenge what’s possible, never simply accepting what has always been done. We reframe old problems, seek new solutions and operate comfortably in areas that are unknown. Our backgrounds are diverse, but our team shares a love of the outdoors and a desire to protect it for future generations. Responsibilities As the senior CFD simulations, you will support design and optimization of lubrication and cooling performance of powertrain Drive Units assemblies including e-motors. Build, validate and maintain 3D CFD models (steady state and transient) using industry-standard tools (e.g., Simerics, Star-CCM+ or similar) to predict oil splash, pressure drop, heat transfer, and flow distribution across key systems. Build, validate and maintain 1D lubrication models (stea...