Associate Mechanical Engineer – Onsite, Stock Options

Mainspring Energy; Menlo Park (CA); On-site; USD 90,000 - 120,000; Full time

Benefits offered by this job

Pre-IPO stock options

Job summary

Mainspring Energy is seeking an Associate Mechanical Engineer to contribute to mechanical engineering projects for our Linear Generator platform. You will build practical engineering skills by supporting mechanical design, CAD, drawings, analysis, testing, documentation, troubleshooting, and release activities.

This early-career role focuses on applying fundamentals with guidance, requiring curiosity, attention to detail, hands-on approach, and the ability to execute well-defined tasks while

Qualifications

• BS or MS in Mechanical Engineering or equivalent practical engineering experience.
• Foundational understanding of mechanics, materials, machine design, thermal systems, fluids, manufacturing, or related coursework.
• Experience with CAD tools such as SolidWorks or similar, including part design, assemblies, drawings, or design documentation.
• Ability to execute well-defined engineering tasks, communicate progress, and incorporate feedback from more experienced engineers.
• Interest in hands-on engineering work, including prototyping, testing, troubleshooting, data collection, and design iteration.
• Clear communication and willingness to learn company processes and build practical engineering judgment.

Responsibilities

• Support mechanical engineering projects by completing well-defined design, analysis, testing, documentation, and release tasks with guidance.
• Create and update CAD models, assemblies, drawings, test fixtures, documentation, and engineering reports.
• Assist with basic calculations, tolerance reviews, simulations, test setup, test execution, data review, and troubleshooting.
• Learn company processes for design reviews, drawing release, validation, change control, manufacturing support, and field implementation.
• Communicate progress, questions, blockers, and findings clearly while asking for help early when scope, priorities, or technical approach are unclear.
• Build practical engineering judgment through repeated feedback, hands-on work, and exposure to different design, analysis, test, release, and troubleshooting cycles.

Skills

Mechanical fundamentals

Hands-on engineering

Prototyping

Communication skills

Documentation

Education

BS or MS in Mechanical Engineering

Tools

SolidWorks

Job description

Mainspring Energy is seeking an Associate Mechanical Engineer to contribute to mechanical engineering projects for our Linear Generator platform. You will build practical engineering skills by supporting mechanical design, CAD, drawings, analysis, testing, documentation, troubleshooting, and release activities.

This early-career role focuses on applying fundamentals with guidance, requiring curiosity, attention to detail, hands-on approach, and the ability to execute well-defined tasks while