Senior Manufacturing Engineer

Company Overview

Mainspring Energy is revolutionizing power generation with the world’s most flexible and adaptable local power generation technology, 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 reaction with near‑zero NOx emissions.

Backed by top‑tier investors including Khosla Ventures, Bill Gates, American Electric Power, Lightrock, and General Catalyst, 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:

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.

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.

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.

We are seeking an innovative and highly skilled Manufacturing Engineer to lead the design, development, and implementation of assembly tooling, material handling systems, and scalable production processes for a groundbreaking large electromechanical machine.

In this role, you will play a critical role in translating product designs into manufacturable, high‑precision, and robust components and assemblies  will work closely with Mechanical Design engineers to drive DFM/DFX initiatives, process error‑proofing, and tooling robustness, ensuring efficiency, repeatability, and quality across our production lines.

The ideal candidate will have a strong background in precision fixture design, material handling solutions, overhead lift assist systems, and MES systems. Experience in precision measurement and laser‑based assembly processes is a significant advantage. Additionally, this role requires end‑to‑end ownership, including sourcing, assembly, commissioning, and installation of designed systems.

Join our team if you are ready to bring your expertise to the forefront of manufacturing technology, contributing to the success of our linear generator startup.

• Lead the design of high‑precision fixtures, tools, and equipment for electromechanical assembly and testing.
• Develop material handling solutions, overhead lift assist systems, and custom conveyors, joining technologies and torque/angle control Nutrunners.
• Implement precision measuring systems and laser alignment processes for high‑tolerance assembly.
• Ensure all tooling and equipment meet rigorous quality and performance standards.
• Manage end‑to‑end project execution, from concept through installation and commissioning.
• Collaborate with cross‑functional teams, including R&D, operations, and procurement, to align manufacturing solutions with product requirements.
• Layout planning for future factory design initiatives and collect and document product and…