Mechanical Design Engineer

Position: Staff Mechanical Design Engineer
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. Role Summary As the staff mechanical engineer, you will execute the design of our next-generation Traction Inverter Modules from initial concept through mass production. You will be responsible for designing multiple critical components including busbars, metal housings, sealing interfaces, HV/LV harnesses, stampings and PCBAs, from the ground up.

This role requires close collaboration with cross-functional teams and suppliers to resolve complex packaging and manufacturing challenges in a dynamic environment. This position is based at our Carson, CA facility and reports directly to the Mechanical Engineering Director. Responsibilities Lead the mechanical development of Traction Inverter Modules using CATIA V6/3

DEXPERIENCE 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 Lead the creation of 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 test 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 Qualifications Bachelor's degree in mechanical engineering or a related engineering discipline 6+ years of engineering experience specifically in the development and packaging of Power Electronics assemblies Expert-level proficiency in CATIA V5 or V6 (3

DEXPERIENCE), 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 Practical knowledge of integrating components using laser welding, press-fit, soldering, heat staking and thermal interface materials (TIM) High proficiency in GD&T (ASME Y14.5) and experience developing DFMEA documents and system-level validation plans (Mechanical, Electrical, and Thermal) Working knowledge of the ENOVIA Product Lifecycle Management environment 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 General knowledge of mechanical best practices for PCBA design and integration.

Prior experience in the Automotive industry (Tier 1 or OEM). Thrives in a fast-paced environment. Proficiency with Microsoft Project, Visio, and the standard Office suite. Pay Disclosure The salary range for this role is USD ,200 for Southern California based applicants. This is the lowest to highest salary we in good faith believe we would pay for this role at the time of this posting.

An employee's position within the salary range will be based on several factors, including, but not limited to, specific competencies, relevant education, qualifications, certifications, experience, skills, geographic location, shift, and organizational needs. The successful candidate may be eligible for annual performance bonus and equity awards. We offer a comprehensive package of benefits for full-time and part-time employees, their spouse or domestic partner, and children up to age 26, including but not limited to paid vacation, paid sick leave, and a competitive portfolio of insurance…