Sr. Power Electronics Mechanical Engineer

About the role

The Lead Staff Mechanical Engineer will drive the design of Rivian's next-generation Power Electronics Module, working closely with cross-functional teams to address complex packaging challenges. This role is based in Torrance, CA and reports directly to the Sr. Mechanical Engineering Manager.

Responsibilities

• Support the mechanical development of Power Electronics Modules using CATIA V6/3DEXPERIENCE Design
• 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
• 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
• Lead the creation of DFMEAs and develop robust Design Verification (DV) test plans to ensure long-term product reliability
• 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

Qualifications

• Bachelor’s degree in mechanical engineering or a related engineering discipline; Master's degree preferred
• 5+ years of engineering experience specifically in the development and packaging of Power Electronics assemblies
• Expert-level proficiency in CATIA V5 or V6 (3DEXPERIENCE), specifically within Part Design and Assembly Design workbenches
• Proven track record designing for diverse processes, including high-pressure die casting, injection molding, and sheet metal fabrication
• Deep experience in the design of high-voltage busbars, HV/LV wire harnesses and sealing/gasket systems
• High proficiency in GD&T (ASME Y14.5) and experience developing DFMEA documents and system-level validation plans (Mechanical, Electrical, and Thermal)
• Extensive experience managing external technical suppliers, ensuring quality and timeline adherence
• Demonstrated ability to use structured root-cause analysis techniques to identify and resolve complex component failures
• Prior experience in the Automotive industry (Tier 1 or OEM)
• Thrives in a fast-paced startup environment
• Proficiency with Microsoft Project, Visio, and the standard Office suite