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Mainspring EnergyPosted 3 weeks ago

Staff Mechanical Engineer

On-siteMenlo Park, California, United States

Full TimeSenior LevelMedium

Job Summary

Own defined-scope mechanical engineering tasks, workstreams, or moderate-complexity projects for the Linear Generator platform. Design moderately complex parts, assemblies, fixtures, or subsystems while considering function, interfaces, manufacturability, serviceability, cost, reliability, and safety. Use engineering calculations, tolerance reviews, simulations, experiments, test data, and hands-on troubleshooting to validate designs and guide improvements. Develop and execute test plans, interpret results, document findings, and use evidence to support design, validation, and release decisions. Track deliverables, manage dependencies, communicate blockers early, and follow through on design, documentation, validation, and release activities. Work cross-functionally with engineering, manufacturing, quality, supply chain, test, reliability, suppliers, and service teams to resolve issues and move projects forward.

Required Qualifications

  • BS or MS in Mechanical Engineering or a similar engineering field
  • 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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