Sr. Power Electronics Mechanical Engineer

Rivian•Carson, CA

11h•Onsite

About The Position

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. Role Summary As a Sr. Power Electronics Mechanical Engineer, you will be working on our next-generation Inverter Modules from initial concept through to full-scale production. You will be responsible for designing critical components including Busbars, metal housings, sealing interfaces, and HV/LV harnesses, Plastic Injection molded parts from the ground up. This role requires close collaboration with cross-functional teams to resolve complex packaging challenges. This position is based at our Carson, CA facility and reports directly to the Sr. Staff Power Electronics Mechanical Engineer, Electric Power Conversion Group (EPC).

Requirements

Bachelor’s degree in mechanical engineering or related engineering field; Master's preferred
Minimum 4 years of professional work experience as an engineer releasing Power Electronics assemblies
Extensive experience interfacing and managing external suppliers
Knowledge of CATIA V5 or V6 software including part design and assembly design workbenches
Experience with fundamental design practices of die casting, sheet metal, and injection molding
Knowledge of GD&T per ASME Y14.5
Ability to understand electrical and mechanical drawings
Understanding and knowledge of ENOVIA Product Lifecycle Management system

Nice To Haves

Experience working in the automotive industry and startup environment preferred

Responsibilities

Lead the mechanical development of Inverter Modules using CATIA V6/3DEXPERIENCE
Design and engineer a wide array of components, including high-pressure die castings, injection-molded plastics, busbars, sheet metal, high/low voltage harnesses, sealing interfaces, and PCBA mechanical integration
Manage the full release cycle of mechanical components using ENOVIA, ensuring data integrity and design maturity
Generate and maintain complex Top-Level Assembly Bills of Materials (BOM), ensuring all component attributes are captured with 100% accuracy
Drive weekly technical reviews with suppliers to close open design items, manage timelines, and ensure DFM (Design for Manufacturing) alignment
Act as the primary technical liaison for Supply Chain and Supplier Quality teams to resolve action items and maintain production schedules
Author critical engineering documents, including Component Technical Specifications (CTS), Statements of Work (SOW) for sourcing, and detailed assembly manuals
Collaborate with Systems team on DFMEAs and develop robust Design Verification (DV) test plans to ensure long-term product reliability
Provide on-site support for pre-production lines, including the design of specialized mechanical fixtures and assembly aids
Collaborate closely with Manufacturing Engineering to design, validate, and commission the production line on schedule
Lead troubleshooting efforts for issues arising during prototype builds and scale-up
Spearhead the root cause investigation of field failures related to mechanical assemblies, implementing design improvements to prevent recurrence