Sr. Mechanical Engineer, Gearbox Rivian - 2.7 Tustin, CA Job Details Full-time 1 hour ago Qualifications Rapid prototyping Fabrication Polymers experience in materials engineering 3D modeling software Noise, vibration, harshness (NVH) analysis for vehicles Verification (System development task) Performance testing in mechanical engineering ISO standards Injection (injection molding) Reliability analysis GD&T 3D modeling for product design Design development Design failure mode and effects analysis (DFMEA) Design engineering Prototype creation 2D CAD drafting Simulation tools Mechanical drive systems 3D modeling Senior level Test validation method Mechanical product validation projects Prototypes Sensors Power transmission systems Validation design Product lifecycle management Failure analysis Engineering quality assurance Full Job Description Design, develop, and validate gearboxes and actuators Design, develop, and validate plastic gears and gear trains for angle sensors and other mechatronic sensing/actuation applications Perform gearbox design calculations, tolerance analysis, and tooth form optimization using KISSsoft Specify and verify gear quality and tolerance requirements in accordance with

Standard:

ISO 1328

Apply plastic gear design guidelines per

Standard:

VDI 2736

accounting for shrinkage, thermal expansion, moisture absorption, and wear Create detailed 3D models of plastic gears, gearboxes, shafts, etc. Collaborate with electrical engineers to integrate gear trains with angle sensors and other position-sensing components Coordinate injection-molded gear tooling, sampling, and validation efforts with Tier 1 and Tier 2 suppliers Develop and execute design verification plans and reports (DVP&R) for gear performance, durability, and NVH Lead and maintain design failure mode and effects analyses (DFMEAs) for gear and sensor assemblies Prototype and iterate designs using hands-on fabrication, gear metrology, and lab testing to validate functionality • Proven experience designing plastic (injection-molded) gears, including tooth form compensation, backlash management, and material selection Proficiency in KISSsoft for gear design, calculation, and simulation Working knowledge of

Standard:

ISO 1328

gear tolerance classifications Familiarity with

Standard:

VDI 2736

plastic gear design and testing guidelines Experience designing gears for angle sensors or similar rotary position sensor gear trains Proficient in 3D/2D CAD (Catia V5/V6 preferred) and Multibody dynamics (MBD) Strong knowledge of GD&T and tolerance stack-up analysis Solid foundation in polymer material properties, injection molding processes, and gear metrology Familiarity with PLM systems, BOM structuring, engineering changes, and deviation processes