Eos Energy Enterprises Appoints Cybersecurity and Software Leader Haiyan Song to Board of Directors, Names Marie Martin Chief Legal Officer in Planned Transition

About this update from Eos Energy Enterprises, Inc.

Song brings deep technology, cybersecurity, software, edge computing, and digital infrastructure expertise as Eos scales American-made energy storage for an increasingly complex grid Pittsburgh-based Martin brings two decades of legal and governance leadership at global industrial companies to strengthen Eos' foundation as it scales U.S. manufacturing and commercial deployment PITTSBURGH, July 09, 2026 (GLOBE NEWSWIRE) -- Eos Energy Enterprises, Inc. (NASDAQ: EOSE) ("Eos" or the "Company"), America's leading innovator in designing, manufacturing, and providing zinc-based long-duration energy storage (LDES) systems sourced and manufactured in the United States, today announced the appointment of Haiyan Song to its Board of Directors and a planned leadership transition of the Company's Chief Legal Officer. The announcements come as Eos scales U.S. manufacturing and accelerates commercial deployments. The Company is building the technology, talent, and governance foundation to lead in an energy storage market being reshaped by surging electricity demand, tightening grid constraints, and the growing role of data, software, and cybersecurity in how storage systems are built, secured and operated. Board AppointmentSong brings more than three decades leading software, cloud, cybersecurity, data, and enterprise technology businesses, most recently as Executive Vice President of NetApp's CloudOps business, with prior senior leadership roles at F5, Splunk and Hewlett Packard Enterprise spanning product, engineering, cloud, cybersecurity and go-to-market functions at global scale. She also brings public and private board experience through her service on the boards of CSG and Kodiak Solutions. Her appointment will strengthen Eos' software, data, and cybersecurity strategy. Song's software and edge computing expertise will support Eos as storage systems increasingly operate as intelligent assets at the grid edge, processing data and making operating decisions closer to where power is stored and delivered through platforms like the Company's DawnOS™ operating system. "Eos has built a differentiated energy storage platform backed by strong technology and manufacturing capabilities in a market that is becoming increasingly important to the future of American energy infrastructure," said Song. "As energy storage systems continue to evolve, software, data and analytics wi...

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