As a Staff Motor Thermal Engineer at Rivian, you will lead the thermal architecture and cooling strategy for next-generation electric drive units. This role involves bridging the gap between system modeling and testing to ensure optimal thermal performance. You will work closely with a diverse team that shares a passion for the outdoors and innovation. The position requires a deep understanding of thermal management in electric vehicles and the ability to manage multiple tasks in a dynamic environment.

• BS, MS or PhD in Mechanical Engineering, Thermal Sciences, or a related field
• 7+ years of experience in EV powertrain lubrication and thermal management
• Expert-level experience in GT-Suite for transient analysis
• Extensive experience in Simerics-MP+ or Star-CCM+ focusing on Volume of Fluid (VOF) or Moving Particle Semi-implicit (MPS) methods
• Deep understanding of convective heat transfer coefficients in rotating machinery and fluid dynamics of dielectric oils
• Scripting skills in Python or MATLAB for post-processing and workflow automation
• Knowledge of automated optimization tools such as HEEDS or ModeFRONTIER
• Experience in lab setup, data collection, and validating thermal and hydraulic designs' performance
• Fundamental knowledge of electric machines, motor mechanical designs, and manufacturing processes
• Self-motivated with the ability to manage multiple tasks efficiently

• Develop and maintain end-to-end lubrication and thermal models for EV motors.
• Lead the design and optimization of direct oil motor cooling systems.
• Define lubrication and thermal requirements for the motor, inverter, and transmission interface.
• Design test plans for motor dyno and drive unit validation.
• Perform tests, collect and process data, and correlate simulation results with physical hardware.
• Collaborate with a cross-functional team to balance power density, efficiency, and thermal management.

• Employees at Rivian are often offered comprehensive health, dental, and vision insurance, a 401(k) with company match, ESPP and potential RSU grants, performance bonuses, and generous time off including paid parental and sick leave. Perks can include 24/7 mental-health coaching and therapy, Hinge Health for Anthem enrollees, tuition assistance and professional development, plus on-site food and a wide range of employee discounts on items like computers, mobile phones, home loans, and pet care.