Justin Gray
Oakland
Summary
Senior prototype technician with extensive hands-on experience in building, debugging, and validating complex mechanical and high-voltage electrical systems. Proven expertise in automotive, hydrogen, marine, robotics, and autonomous platforms. Manages complete project lifecycle from CAD design and fabrication to wiring integration, testing, and field support.
Overview
12
12
years of professional experience
1
1
Certification
Work History
Senior Prototype Technician
Agtonomy
South San Francisco
01.2025 - Current
- Build, test, and debug autonomous tractor prototypes
- Resolve mechanical, electrical, and integrated system issues
- Design and fabricate prototype components (SolidWorks, Creo, 3D printing, laser cutting)
- Establish and maintain fabrication and assembly workflows
Hydrogen R&D Technician
Zero Emission Industries
South San Francisco
01.2023 - 01.2025
- Design, build, and test high‑voltage powertrain systems for hydrogen platforms
- Develop and operate a 340 kWh battery microgrid for system validation
- Integrate fuel cells, hydrogen storage, compressors, and battery systems
- Install and debug EV drive systems up to 250 kW / 700 VDC
- Designed high pressure (900 bar) and cryogenic (45k) hydrogen systems
Senior Prototype Vehicle Technician
Lucid Motors
Newark
01.2020 - 01.2023
- Support beta builds and validation for Air, Sapphire, and Gravity programs
- Build scratch vehicles for media and public events
- Execute engineering prototype builds and test mules
- Diagnose CAN, LIN, and Ethernet networks
- Perform low‑ and high‑voltage (600–1000 VDC) diagnostics
Founder / CTO
Cooper Gray Robotics, LLC
Oakland
01.2014 - 01.2020
- Founded and led R&D firm focused on electric drive vehicles and robotic equipment
- Delivered advanced R&D projects for Bobcat Company
- Designed and built a 12‑ton amphibious firefighting robot (VR‑operated)
- Secured a patent for an electric drivetrain bucket loader
Skills
- End‑to‑end prototype ownership
- High‑voltage electrical systems
- Mechanical & electrical debugging
- EV systems
- Battery systems
- Fuel cell systems
- Hydrogen systems
- cryogenic system
- High pressure gas systems (900bar)
- Shop setup and build out
- CAN diagnostics
- SolidWorks
- Creo Parametric 80
- Machining
- Welding
- Fabrication
- Wiring harnesses
Tools And Systems
- High-voltage electrical systems (12–1000 VDC)
- EV powertrains, batteries, fuel cells, hydrogen systems
- CAN, LIN, Ethernet diagnostics
- SolidWorks, Creo Parametric 8.0
- Machining, welding, fabrication
- Wiring harnesses, control panels
Certification
- U.S. Coast Guard hydrogen operations
- High voltage battery (750vdc)
- Forklift
Timeline
Senior Prototype Technician
Agtonomy
01.2025 - Current
Hydrogen R&D Technician
Zero Emission Industries
01.2023 - 01.2025
Senior Prototype Vehicle Technician
Lucid Motors
01.2020 - 01.2023
Founder / CTO
Cooper Gray Robotics, LLC
01.2014 - 01.2020