About Eos Energy Enterprises Eos Energy Enterprises, Inc. is accelerating the shift to American energy independence with positively ingenious solutions that transform how the world stores power. Our breakthrough Znyth™ aqueous zinc battery was designed to overcome the limitations of conventional lithium-ion technology. It is safe, scalable, efficient, sustainable, manufactured in the U.S., and the core of our innovative systems that today provides utility, industrial, and commercial customers with a proven, reliable energy storage alternative for 3 to 12-hour applications. Eos was founded in 2008 and is headquartered in Edison, New Jersey. For more information about Eos (NASDAQ: EOSE), visit eose.com. Apply now to our Summer 2027 Internship Opportunities! Are you passionate about innovative, sustainable energy technology and eager to be part of building the energy future? At Eos Energy we are at the forefront of safe, scalable, energy storage solutions that are proudly American-made. We are excited to offer internship opportunities for motivated individuals who are ready to contribute and gain hands-on experience. Join us and be part of a team that is driving and shaping the future of energy! Pittsburgh, PA Opportunities may Include: • Operations (Electrical/Mechanical Engineering, Field Service, Manufacturing Management, Safety, Quality) • Science & Technology (Data Science, Information Technology, Software Engineering) • Corporate Functions (Accounting, Finance, Human Resources, Legal, Marketing, Sales, Supply Chain) Edison, NJ Opportunities may Include: • Science & Technology (Chemistry, Data Science, Information Technology, Research & Development, Software Engineering) Key Opportunities! • Immerse yourself in valuable hands on projects, solving business problems, maximizing efficiencies, analyzing data, and gain invaluable experience contributing to a scaling company in the US energy industry! • Collaborating and networking opportunities with experienced industry leaders and executives • Showcase your skills and experience reflecting on your contributions and lessons learned through final presentations in August Schedule & Travel To gain the best possible experience from the internship program, our internships are fully onsite. Our summer internship program is a 10 week paid program beginning on 5/31/27 and ending on 8/6/27. Requirements: • Enrolled in a bachelor’s program with an accredited college/university entering junior or senior year • Educational program requirements determined by specific internship opportunity • Reliable transportation to Eos site locations • Must have authorization to work in the US