Senior Staff Mechanical Engineer - Electromechanical jobs in United States
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Mainspring Energy · 23 hours ago

Senior Staff Mechanical Engineer - Electromechanical

positionMenlo Park, CA
timeFull-time
remoteOnsite
senioritySenior Level, Lead/Staff
money$148K/yr - $200K/yr
date11+ years exp

Mainspring Energy is revolutionizing power generation with its innovative Linear Generator technology. The Senior Staff Mechanical Engineer will focus on designing electrical enclosures and cables, leading engineering projects, and managing cross-functional teams to ensure technical requirements are met from concept through manufacturing launch.

Clean EnergyEnergyOil and Gas
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H1B Sponsor Likelynote

Responsibilities

Lead ideation and design reviews to develop innovative solutions that enhance performance and reduce cost of the Linear Generator and its electrical subsystems
Own the structure, layout, optimization, prototyping, testing, and deployment of electrical enclosures and harnesses
Partner with Electrical, Reliability, Test, NPI, Manufacturing, and supplier teams to define design direction, validate solutions, and meet project milestones
Oversee execution by setting requirements and coordinating across disciplines to maintain cohesive technical direction
Manage and mentor engineers, guiding technical decisions, setting priorities, and supporting professional growth
Proactively balance timelines, resources, and risks to ensure consistent delivery on key engineering initiatives

Qualification

Electrical enclosure designMechanical-electrical integrationDesign for manufacturabilitySolidWorksThermal modelingMentoring engineersTechnical trade-offsCross-functional collaboration

Required

Degree: BS or MS in Mechanical, Electrical, or related engineering field with 11 years of industry experience
Proven ownership of electrical enclosure and cable designs, with experience influencing cross-functional teams
Deep expertise in sheet metal, mechanical–electrical integration, and design for manufacturability
Strong foundation in electrical principles, thermal modeling, and system-level design
Proficient in SolidWorks and PDM
Demonstrated ability to make technical trade-offs, guide design direction, and deliver complex systems
Passion for mentoring engineers and advancing high-impact, low-carbon energy technologies

Preferred

Experience with CFD/FEA tools (e.g., Ansys) is a plus

Benefits

Pre-IPO stock options
Benefits

Company

Mainspring Energy

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Mainspring Energy provides power generation technology using linear generators for clean energy.
dateFounded in 2010
location
Menlo Park, California, USA
people-size201-500 employees
web-link
https://mainspringenergy.com

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 Stage
Total Funding
$813M
Key Investors
General CatalystUS Department of EnergyBloombergNEF
2025-04-14Series F· $258M
2024-10-22Grant· $87M
2023-04-17Grant

Leadership Team

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Shannon Miller
CEO and Founder
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Adam Simpson
CCO and Founder
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Recent News

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2025-10-13
Company data provided by crunchbase