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Mainspring EnergyPosted 3 weeks ago

Mechanical Engineer

On-siteMenlo Park, California, United States

Full TimeMedium

Job Summary

Design moderately complex parts, assemblies, fixtures, or subsystems for the Linear Generator platform, balancing function, manufacturability, and reliability. Use engineering calculations, simulations, and test data to validate designs and guide improvements through multiple project phases. Develop test plans, interpret results, and document findings to support release decisions. Independently own defined-scope tasks while collaborating cross-functionally with engineering, manufacturing, quality, and supply chain teams to resolve issues and drive projects forward.

Required Qualifications

  • BS or MS in Mechanical Engineering or a similar engineering field, with demonstrated experience contributing to mechanical design work beyond purely academic projects
  • Experience designing, analyzing, testing, and iterating mechanical hardware through multiple project phases or design cycles
  • Ability to independently own defined-scope engineering work with clear deliverables, while seeking guidance for ambiguous, complex, or high-risk decisions
  • Strong mechanical fundamentals, including practical experience with parts, assemblies, fixtures, mechanisms, structures, thermal systems, fluid systems, electromechanical packaging, or other relevant mechanical systems
  • Demonstrated ability to use analysis, testing, data, and engineering judgment to evaluate designs, compare options, and recommend practical next steps
  • Clear communication and execution skills, including the ability to document assumptions, decisions, risks, test results, and project status for technical and cross-functional stakeholders

Desired Qualifications

  • Experience supporting hardware from concept through prototype, validation, release, production, or field use
  • Experience with CAD tools such as SolidWorks or similar, including part design, assembly design, drawings, and design documentation
  • Experience with PLM systems, drawing release, engineering change processes, supplier qualification, production support, or field implementation
  • Experience with structured problem-solving, root cause analysis, failure analysis, design of experiments, reliability testing, or risk-based validation planning
  • Experience working with suppliers, contract manufacturers, production teams, quality teams, or field service organizations
  • Experience with energy systems, engines, generators, compressors, pumps, thermal systems, fluid systems, structures, high-cycle fatigue environments, precision alignment systems, or industrial equipment

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