San Francisco, California, United States · On-site
2026 Fall Engineering Intern Location: [On-site — San Francisco] · Term: Fall 2026 (Sept–Dec, dates flexible) · Type: Full-time or part-time internship About Estes Energy Estes develops and manufactures zero-emission pow…
Skills: Mechanical Engineering, Electrical Engineering, Controls Engineering, Battery Systems, Manufacturing Engineering
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Contribute to the design, build, and testing of components for zero-emission power systems. Develop experiments, build analytical tools, and drive a defined project to a measurable result.
Pursuing a degree in a related engineering field such as Mechanical, Electrical, Chemical, or Materials Science. Must demonstrate a bias toward making things through hands-on project, lab, or research experience.
Location: [On-site — San Francisco] ·
Term: Fall 2026 (Sept–Dec, dates flexible) ·
Type: Full-time or part-time internship
Estes develops and manufactures zero-emission power systems that unlock true scale and performance for the electrification of commercial vehicle and equipment markets. Our goal is to democratize electrification — delivering powertrain solutions at better cost and performance than diesel, for both high-volume OEMs and next-generation newcomers.
We work on transforming advanced materials into battery systems for industrial and commercial applications, most of which runs on diesel today.
The problem we're attacking is real. Roughly 3.9 million barrels of diesel (5.8 TWh of energy) are burned every day in the U.S., mostly by commercial vehicles and equipment — emitting 1.66 megatonnes of CO₂, 353 kilotonnes of NOx, and 9.92 kilotonnes of SOx daily. We exist to move the needle on transitioning a century-old diesel-burning industry to electric.
We're a small, deeply technical team with ambitious goals, and our interns do real engineering work (not pet projects). As an Engineering Intern, you'll own a meaningful slice of a live project, work shoulder-to-shoulder with senior engineers, and see your contributions make it into actual systems. You'll reason from first principles, let data drive your decisions, and design with cost and scale in mind from day one.
Reason from first principles · Only data can save us · Take deep ownership and excel at your craft · Design for cost and scale at every stage · Operate with good faith and accountability.
Compensation is tailored to experience and role scope.
This is a paid internship based on-site at San Francisco.
At Estes, we're building a team grounded in competence, character, and mutual respect, and we believe diverse perspectives are essential to solving the complex problems of our industry. We provide a workplace free from discrimination, harassment, and retaliation, and we ensure equal opportunity in all employment practices.
Exceptional battery systems for the era of decarbonization
Estes is an electrification systems development and manufacturing technology company, with an initial focus on durable high voltage battery systems for all mobility sectors. We are taking a novel approach to battery systems architecture through deep vertical integration, while building a US-based supply chain and manufacturing footprint. Headquartered in San Francisco, Estes was founded by experienced industry pioneers from Tesla, Proterra, Sila, and Cummins.
Offices: San Francisco, CA 94107, US
Exceptional battery systems for the era of decarbonization
Estes is an electrification systems development and manufacturing technology company, with an initial focus on durable high voltage battery systems for all mobility sectors. We are taking a novel approach to battery systems architecture through deep vertical integration, while building a US-based supply chain and manufacturing footprint. Headquartered in San Francisco, Estes was founded by experienced industry pioneers from Tesla, Proterra, Sila, and Cummins.
Offices: San Francisco, CA 94107, US
