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Senior Mechanical Engineer - Exhaust System
Mainspring EnergyMenlo Park, United Statesfull_timeVerifiedPosted 2 Jul 2025
About the role
Company Overview
Mainspring Energy is revolutionizing power generation with the world’s most flexible and adaptable onsite power generator, the Mainspring Linear Generator. Commercial, industrial, and utility leaders are choosing Mainspring over traditional options like engines, turbines, and fuel cells to quickly and reliably deliver local power for EV charging, commercial facilities, data centers, and grid-scale operations. The Mainspring Linear Generator is fuel flexible, ramps up and down to meet demand, and utilizes a flameless technology with near-zero NOx emissions.
Backed by top-tier investors such as Khosla Ventures, Bill Gates, American Electric Power, and Lightrock, Mainspring designs, manufactures and delivers its products to customers across the U.S. today, and we’re quickly scaling for international expansion.
Inspired by our vision of the affordable, reliable, net-zero carbon grid, Mainspring is rapidly expanding within the $816B global electricity equipment market, and we’re hiring the best talent to meet growing customer demand around the globe. We welcome a broad range of backgrounds, experiences, and talents to bring fresh perspectives and ongoing innovation to our customers.
We are looking to build relationships with people who share our values:
Pragmatic Optimism. Building a new category of world-class power generation requires the optimism of ambition and creativity, balanced with practicality to solve problems efficiently. The challenges that arise are opportunities for growth.
Excellence without Ego. We bring expertise and commitment to creating the best customer experience, from sales to deployment and service, just as we apply deep technical rigor to building and delivering world-class products. We strive for excellence and behave as leaders with the humility to acknowledge our challenges, both collectively and as individual contributors.
Proactive Collaboration. The integration and cross-disciplinary nature of Mainspring’s business requires intentionally seeking out others who bring different skills, perspectives, and priorities. Our culture of inclusion and respect extends beyond our team to interactions with our partners and customers.
More information can be found at www.mainspringenergy.com
Job Overview
Mainspring Energy is seeking a talented Senior Mechanical Engineer to join the team responsible for the design and development of the exhaust system for our innovative Linear Generator technology. This critical system manages high temperatures and vibration while ensuring emissions compliance, acoustic attenuation, and long-term durability. This is a challenging, hands-on role where your creativity, strong engineering fundamentals, and practical skills will directly contribute to making a significant impact on our clean energy solution.
Mainspring Energy is revolutionizing power generation with the world’s most flexible and adaptable onsite power generator, the Mainspring Linear Generator. Commercial, industrial, and utility leaders are choosing Mainspring over traditional options like engines, turbines, and fuel cells to quickly and reliably deliver local power for EV charging, commercial facilities, data centers, and grid-scale operations. The Mainspring Linear Generator is fuel flexible, ramps up and down to meet demand, and utilizes a flameless technology with near-zero NOx emissions.
Backed by top-tier investors such as Khosla Ventures, Bill Gates, American Electric Power, and Lightrock, Mainspring designs, manufactures and delivers its products to customers across the U.S. today, and we’re quickly scaling for international expansion.
Inspired by our vision of the affordable, reliable, net-zero carbon grid, Mainspring is rapidly expanding within the $816B global electricity equipment market, and we’re hiring the best talent to meet growing customer demand around the globe. We welcome a broad range of backgrounds, experiences, and talents to bring fresh perspectives and ongoing innovation to our customers.
We are looking to build relationships with people who share our values:
Pragmatic Optimism. Building a new category of world-class power generation requires the optimism of ambition and creativity, balanced with practicality to solve problems efficiently. The challenges that arise are opportunities for growth.
Excellence without Ego. We bring expertise and commitment to creating the best customer experience, from sales to deployment and service, just as we apply deep technical rigor to building and delivering world-class products. We strive for excellence and behave as leaders with the humility to acknowledge our challenges, both collectively and as individual contributors.
Proactive Collaboration. The integration and cross-disciplinary nature of Mainspring’s business requires intentionally seeking out others who bring different skills, perspectives, and priorities. Our culture of inclusion and respect extends beyond our team to interactions with our partners and customers.
More information can be found at www.mainspringenergy.com
Job Overview
Mainspring Energy is seeking a talented Senior Mechanical Engineer to join the team responsible for the design and development of the exhaust system for our innovative Linear Generator technology. This critical system manages high temperatures and vibration while ensuring emissions compliance, acoustic attenuation, and long-term durability. This is a challenging, hands-on role where your creativity, strong engineering fundamentals, and practical skills will directly contribute to making a significant impact on our clean energy solution.
Key Responsibilities
- Lead design and development of exhaust subsystems projects, including conceptualization, detailed design, 3D CAD modeling (Solidworks), engineering analysis (FEA/CFD tools like ANSYS for thermal, structural, and flow), testing, root cause investigation, and comprehensive documentation
- Focus on challenges specific to exhaust systems, such as material selection for high temperatures, design for vibration and durability, integration of emissions control components, and acoustic attenuation strategies
- Collaborate effectively with cross-functional teams (Electrical Engineering, Controls, Manufacturing, Suppliers) to ensure seamless subsystem integration, performance, and support new product introduction (DFM/DFA, work instructions, tooling/fixtures)
- Plan and execute rigorous verification and validation testing to ensure designs meet demanding requirements (functional, durability, thermal, vibration, acoustic, safety, reliability)
- Support the continuous improvement of engineering processes, tools, standards, and best practices within the team
- Stay current on advancements in mechanical engineering relevant to exhaust systems, power generation, and emissions control, identifying opportunities to reduce cost, improve performance, and increase reliability
- Uphold and further Mainspring's mission to create clean, affordable, and reliable power generation that accelerates the world's transition to a sustainable energy future
Education and Experience
- Bachelor's or Master's degree in Mechanical Engineering or similar field
- 5+ years as a professional mechanical design engineer
- Delivered products through 2+ full design lifecycles from concept to manufacturing support, preferably involving industrial equipment, power generation, engine systems, or similar demanding applications
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