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Senior Mechanical Design Engineer - Metal Structures

mainspringenergy
Companymainspringenergy
CategoryEngineering
LocationMenlo Park
RemoteOn-site (inferred)
EmploymentNot stated
LevelSenior
SalaryUSD 140k–165k
Posted28 Feb 2026
Last verified3 Aug 2026
SourceEmployer ATS (lever)
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Description
About Mainspring Mainspring Energy manufactures and delivers fuel-flexible, low-emissions local power solutions that rapidly add new capacity and deliver reliable, affordable, and sustainable electric power. The company began commercial shipments of its Mainspring Linear Generators in 2020 and today has hundreds of megawatts in advanced development and field operations for leading Fortune 500 companies, data centers, and utilities. Mainspring also partners with global energy leaders including AEP, NextEra Energy Resources, Schneider Electric, and more. The core values that ground our work, guide our decisions, and connect us together: Pragmatic Optimism Excellence without Ego Proactive Collaboration Senior Mechanical Design Engineer - Metal Structures Mainspring is looking for Senior Mechanical Design Engineers with a focus on designing sheet metal components and assemblies.  In this role, you will be responsible for developing and improving designs, overcoming DFM challenges, managing vendors, procuring and testing parts, and ensuring high-quality execution across all phases of product development. The ideal candidate will have a strong combination of technical expertise and the drive to solve complex problems in a collaborative environment.