Prototype & Vehicle Systems Engineer I - Electrification

Stefanini, Inc; Cerritos (CA); On-site; USD 52,000 - 72,000; Full time

Job summary

Motive Workforce is seeking an entry-level Mechanical Engineer I to support prototype development and vehicle integration for locomotive electrification programs in Cerritos, CA. This hands-on role connects mechanical design with prototype fabrication, testing, and shop-floor execution.

Responsibilities include designing and revising layouts for cooling systems, building and testing prototype hardware, and coordinating with electrical teams on high-voltage packaging.

Qualifications

• Bachelor's degree in Mechanical Engineering, Automotive Engineering, or a related discipline.
• Zero to two years of relevant engineering experience.
• Proficiency with SolidWorks, Creo, NX, or a comparable CAD platform.
• Working knowledge of mechanical drawings, tolerances, and GD&T.
• Familiarity with thermal management and basic structural analysis.
• Comfortable working in both engineering and shop environments.
• Able to support hands-on prototype assembly, instrumentation, and testing.
• Strong communication and cross-functional coordination skills.

Responsibilities

• Design and revise mechanical layouts for cooling systems, radiators, fans, ducting, structural mounts, brackets, and auxiliary enclosures
• Build, instrument, and test prototype hardware
• Support bench testing and vehicle-level integration
• Create and maintain CAD models and engineering drawings using SolidWorks, Creo, or NX
• Perform fit checks, tolerance stack-ups, and GD&T reviews
• Coordinate DFM and DFA reviews with fabrication and machine shop vendors
• Investigate prototype and field failures, then support design corrections
• Coordinate with electrical and controls engineers on high-voltage component packaging, harness routing, and thermal clearances
• Support rapid design iterations based on test results and project requirements

Skills

CAD software

SolidWorks

Creo

NX

GD&T

Thermal management

Prototype testing

Cross-functional coordination

Education

Bachelor's degree in Mechanical Engineering

Job description

Motive Workforce is seeking an entry-level Mechanical Engineer I to support prototype development and vehicle integration for locomotive electrification programs in Cerritos, CA. This hands-on role connects mechanical design with prototype fabrication, testing, and shop-floor execution.

Responsibilities include designing and revising layouts for cooling systems, building and testing prototype hardware, and coordinating with electrical teams on high-voltage packaging.