Staff Motor Thermal Engineer

Staff Motor Thermal Engineer Rivian - 2.7 Carson, CA Job Details Full-time 1 hour ago Qualifications Bachelor's degree in mechanical engineering MATLAB Engineering testing Computational fluid dynamics (CFD) Bachelor of Science Engineering Mechanical Engineering Laboratory experience Doctorate in mechanical engineering Analysis skills Bachelor's degree Doctor of Philosophy Master's degree in mechanical engineering Master of Science Powertrain Simulation systems Data collection Manufacturing Design of mechanical systems Senior level Cross-functional collaboration Mechanical knowledge Python Cross-functional communication Test Planning (Quality assurance practices) Engineering validation Full Job Description As a Staff Motor Thermal Engineer, you will lead the thermal architecture and cooling strategy for our next-generation electric drive units. You will be a point of contact for direct-oil cooling systems, bridging the gap between rapid 1D system modeling, high-fidelity 3D CFD, correlating and improving models through testing to ensure the motor achieves thermal performance requirements while meeting reliability and efficiency. Develop and maintain end-to-end lubrication & thermal models for EV motor, ranging from 0D, 1D system-level analysis (GT-Suite, Amesim) to 3D CFD (Simerics-MP+, Star-CCM+) Lead the design and optimization of direct oil motor cooling, including shaft, rotor, stator, and spray cooling for end-windings Define lubrication and thermal requirements for the motor, inverter, and transmission interface Design test plans for motor dyno and drive unit validation, perform test, collect and process data, and correlate simulation results with physical hardware to refine modeling accuracy Collaborate with a cross-functional team to balance the "Golden Triangle" of motor design: power density, efficiency, and thermal management

Education:

BS, MS or PhD in Mechanical Engineering, Thermal Sciences, or a related field 7+ years in EV powertrain lubrication and thermal management Expert-level of experience in GT-Suite for transient analysis Extensive experience in Simerics-MP+ or Star-CCM+, specifically focusing on Volume of Fluid (VOF) or Moving Particle Semi-implicit (MPS) methods for oil splashing Deep understanding of convective heat transfer coefficients in rotating machinery and fluid dynamics of dielectric oils Experience in multiphase flow and/or free-surface modeling Scripting skills in Python or MATLAB for post-processing and workflow automation Knowledge with automated optimization (e.g., HEEDS, Mode

FRONTIER

) 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 while remaining efficient and accurate Flexibility and adaptability in a fast-paced and dynamic work environment