End of Line Technician

Mainspring Energy•Menlo Park, CA

4d•Onsite

About The Position

Mainspring Energy is seeking a motivated, technically skilled End of Line Technician for its Product Testing team. The role supports assembly, testing, validation, and occasional field deployment of Mainspring’s linear generator technology. Work includes mechanical and electronics assembly, diagnostics, retrofits, functional testing, core validation, emissions testing, and electronics box (eBox) testing. The work is primarily performed in-house, with limited field activities to support on-site testing or retrofits. This is an onsite position at Mainspring’s Menlo Park headquarters.

Requirements

At least 3 years of hands-on experience with mechanical assembly and/or repair.
Experience with electronics diagnostics, troubleshooting, and retrofit implementation, including control boxes, sensors, wiring harnesses, and connectors.
Willingness and ability to perform limited field work, including occasional on-site testing or retrofit support.
Ability to manage multiple tasks, adapt to changing priorities, and maintain a strong commitment to safety and quality.
Proficiency with precision measurement tools such as micrometers, bore gauges, and gauge blocks, with measurement capability down to 0.001 inches.

Nice To Haves

Experience in fast-paced manufacturing, automotive, power generation, or heavy equipment environments.
Knowledge of or experience with core validation, emissions testing, and eBox testing.
Familiarity with software tools, data logging, and test documentation systems.
Forklift or heavy equipment operation experience.
California Class A Commercial Driver’s License (CDL).

Responsibilities

Collaborate with cross-functional build and test teams in a fast-paced production and test environment, and support limited on-site field activities.
Assemble mechanical and electromechanical generator components and subassemblies according to established procedures, identifying opportunities for process improvements.
Diagnose and repair mechanical systems and electronic control and power electronics boxes; perform in-house and field retrofits as needed and implement design updates with engineers.
Conduct core validation, emissions testing, eBox testing, and general generator system functional testing in laboratory, production, and limited field environments.
Inspect equipment and document test results, failures, retrofit actions, and corrective measures, providing actionable feedback to the engineering team.
Contribute to process improvements focused on safety, throughput, retrofit efficiency, and operational effectiveness.