Director of Customer Success

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:

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 scaling deployment of its Linear Generator—a new category of flexible, low-emissions onsite power designed to support a net-zero grid.

As deployments expand, we are seeking a Director of Customer Success to own the customer experience following system commissioning (post-COD). This role sits at the intersection of customer, product, and operations, ensuring that systems perform successfully in the field and that customers remain confident as we scale.

This is a hands-on leadership role requiring close collaboration with Engineering, Product, Field Service, and Commercial teams.

Customer Ownership

• Serve as the primary point of contact for customers post-deployment

• Build strong, trust-based relationships and drive customer satisfaction and retention

Cross-Functional Leadership

• Coordinate across Engineering, Product, Operations, and Sales to align on customer priorities

• Ensure consistent and accurate communication internally and externally

Issue Management & Escalation

• Serve as the primary customer liaison during issue identification, escalation, and resolution — ensuring customers are informed, heard, and supported throughout

• Translate technical findings and resolution timelines into clear, professional communication for customers

• Escalate issues internally with the appropriate urgency and context, connecting the right internal teams to drive resolution

• Maintain visibility into open issues and follow through to closure, ensuring no customer concern falls through the cracks

Performance Communication

• Translate technical system performance into clear, professional customer communication

• Establish consistent reporting on account health, system performance, and key metrics

Function Development

• Build and refine onboarding, account management, and customer success processes

• Directly manage key accounts while helping scale the function over time

• 10+ years of experience in Customer Success, Account Management, Technical Program Management, or similar roles

• Experience managing complex, technical B2B customer relationships

• Proven ability to work cross-functionally with engineering, product, and operations teams

• Strong communication skills, with the ability to convey technical concepts clearly

• Bachelor’s degree in Engineering, Business, or related field

• Experience in power generation, distributed energy, industrial equipment, or infrastructure

• Strong analytical skills with the ability to interpret technical and operational data

• Experience in post-deployment or operational environments

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 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.

In more traditional words, Mainspring Energy, Inc is an Equal Opportunity Employer. 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.

This compensation and benefits information is based on Mainspring Energy's estimate as of the date of publication and may be modified in the future. We generally do not negotiate on salary once we have made an offer. The level of pay within the range will depend on a variety of job-related factors that may include location, relevant prior experience and/or education, or particular skills and expertise. 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.