Supply Chain Associate (Buyer/Planner)

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.
Building a new category of world-class power generation requires the optimism of ambition and creativity, balanced with practicality to solve problems efficiently. 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. Our culture of inclusion and respect extends beyond our team to interactions with our partners and customers.
The Buyer/Planner will be managing various commodities and suppliers from "quote to pay" to ensure continuity of supply and reduce the cost of the assigned portfolio. The candidate will be organized, communicative, hands-on and will have regular shop floor engagement and constant cross-functional engagement with production, NPI, engineering, logistics, material handling, and suppliers. The role balances tactical buying excellence with advanced planning, supplier coordination, and cost control, ensuring uninterrupted supply while supporting business objectives.
Monitor inventory levels, lead times, MOQ compliance and capacity constraints
Ensure material availability while optimizing inventory and working capital
Serve as the primary point of contact for assigned suppliers
Monitor supplier performance (OTD, quality, responsiveness)
At least 2 years of experience in production control, material demand planning, or supply chain management environment
Independent, excellent communicator, and collaborator with Engineering, Quality, Program Management, and Manufacturing
Detail-oriented with thorough analytical capabilities including the ability to solve problems with minimal supervision
Proficient with Google Sheets and Google Workspace tools. Bachelor's Degree in Engineering, Business, Economics, Supply Chain Management or similar discipline
Pragmatic Optimism (creative, practical, problem solver), Excellence without Ego (expertise, rigorous, data-driven, service-oriented, leadership ability, humble), Proactive Collaboration (seeking others, inclusive, respectful)
Smart, cognitively agile, high-horsepower, dependable person
Data-driven and analytical
Deep knowledge of material planning, forecasting factoring in demand, supply, lead times, inventory, and business inputs regarding risks and use-of-capital
Deep understanding of planning systems and parameters to optimize inventory levels
Ability to provide data-driven status updates to manage exceptions
Experience administering competitive RFQs and driving supplier negotiations and supporting cost reduction activities
Ability to build and manage effective supplier relationships and act as the primary interface with suppliers on delivery status, issues, and problem resolution
Ability to communicate proactively with Production, Material Handling, and Engineers about order status and schedule challenges, and manage change orders, rush-requests, and returns, as necessary
Partner with IT and other business stakeholders on planning processes and system improvements
Experienced with cross-functional business process improvements to improve the supply chain efficiency

$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 salary, Mainspring offers pre-IPO stock options + benefits.
At Mainspring, we are committed to building a diverse, inclusive, flexible, and collaborative environment, so if you want to help us transition the world to clean and affordable electricity, and don't meet all posted requirements for a particular role, we'd still love to hear from you. Mainspring can sometimes be flexible enough to shift responsibilities for the right person, or otherwise identify open or upcoming roles that may better fit your professional background.
All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, or protected veteran status and will not be discriminated against on the basis of disability.
New hires joining the company tend to be paid within the starting base pay range noted above, with opportunities to increase pay over time based on development of additional skills, competencies, and company-specific knowledge.
We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. If you would like more information about how your data is processed, please contact us.