Mainspring Energy · 22 hours ago
End of Line Technician
Menlo Park, CA
Full-time
Onsite
Mid Level
$28/hr - $37/hr
3+ years expMainspring Energy is revolutionizing power generation with innovative technology, and they are seeking a motivated End of Line Technician to join their Product Testing team. This role involves mechanical and electromechanical assembly, testing, validation, and occasional field deployment of their linear generator technology.
Clean EnergyEnergyOil and Gas
Responsibilities
Collaborate: Partner with cross-functional build and test teams in a dynamic, fast-paced production and test environment, and provide support for limited on-site field activities
Mechanical & Electronics Assembly: Assemble mechanical and electromechanical generator components and subassemblies following established procedures, identifying opportunities for process improvements
Troubleshoot, Repair & Retrofit: Diagnose and repair mechanical systems and electronic control/power electronics boxes, perform in-house and field retrofits as needed, and implement design updates with engineers
Testing & Validation: Execute comprehensive testing, including core validation, emissions testing, eBox testing, and general generator system functional testing across lab, production, and limited field environments
Inspect & Document: Perform thorough inspections, document test results, failures, retrofit actions, and corrective measures, providing actionable feedback to the engineering team
Continuous Improvement: Contribute to process improvements focused on safety, throughput, retrofit efficiency, and operational effectiveness in a high-tempo environment
Qualification
Required
Minimum 3 years of hands-on mechanical assembly and/or repair experience
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
Proven ability to manage multiple tasks, adapt to changing priorities, and maintain a strong commitment to safety and quality
Proficiency with precision measurement tools (micrometers, bore gauges, gauge blocks) capable of measurements down to 0.001”
Preferred
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
Possession of a California Class A Commercial Driver's License (CDL)
Benefits
Pre-IPO stock options
Benefits
Company
Mainspring Energy
Mainspring Energy provides power generation technology using linear generators for clean energy.
201-500 employees
H1B Sponsorship
Mainspring Energy has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (40)
2024 (23)
2023 (13)
2022 (12)
2021 (6)
Funding
Current Stage
Late StageTotal Funding
$813MKey Investors
General CatalystUS Department of EnergyBloombergNEF
2025-04-14Series F· $258M
2024-10-22Grant· $87M
2023-04-17Grant
Leadership Team
Shannon Miller
CEO and Founder
Adam Simpson
CCO and Founder
Recent News
Crunchbase News
2025-12-17
Company data provided by crunchbase