Inventory Associate - Shipping

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.

More information can be found at

We are searching for an organized and detail‑oriented Inventory Associate to ensure our internal customers in Operations and Maintenance, R&D, and Contract Manufacturing are supplied with the critical parts and kits they need. In this position, you will play a key role in parts kitting and inventory organization, as well as shipping and receiving. You will work within our facility in Menlo Park, collaborating with our highly talented team of mechanics and engineers to bring affordable, dispatchable, and clean energy to the world.

• Manage the receipt, unloading and organization of mission critical supplies
• Maintain our inventory database through data entry of received and consumed items
• Coordinate stock‑related duties, including returning, packing, and labeling materials as needed
• Inspect deliveries for damage or discrepancies and report those to accounting for reimbursements and record keeping
• Monitor kit consumption, ensuring timely replenishment
• Conduct inventory cycle counts to ensure inventory level accuracy

• 2+ years of experience in a warehouse in a manufacturing environment
• Physical ability to frequently lift and carry materials weighing up to 25 pounds, and occasionally up to 50 lbs.
• Minimum of a high school diploma or equivalent
• Good written and verbal communication skills

$24 - $26.50 an hour

This position is onsite at our Menlo Park HQ. The salary will be adjusted to reflect local market conditions based on employee location as well as the experience of the employee. Along with the base hourly, Mainspring offers pre‑IPO stock options + benefits.

Does your experience not meet all of our posted requirements? Studies have shown that some people are less likely to apply to positions unless they meet every listed requirement. At Mainspring, we are committed to building a diverse, inclusive, flexible, and collaborative environment, so if you want to…