Dan Leff

Executive Chairman

Dan has extensive experience building and leading global technology and software, energy services, and industrial manufacturing businesses. He has held several executive and corporate leadership roles, including serving as executive chairman of ServiceChannel and Viridity Energy; CEO and board member of Hara Software; advisory partner with private equity firm Clayton, Dubilier & Rice; COO of Invensys Energy Management and co-COO of its parent company, Invensys plc. He was also chairman and CEO of Enron Energy Services, where following Enron’s bankruptcy, he led teams that managed the liquidation of Enron’s retail and wholesale businesses. Prior to that, Dan was COO of Enron Energy Services following its acquisition of an energy services company that he co-founded. Dan also served as CEO of a NYC-based energy services company, and prior to that, he was with United Technologies Carrier Air Conditioning in domestic and international assignments. Dan enjoys contributing his knowledge and experience by serving as an investor, board member, and advisor to a number of businesses and non-profit organizations.


David Bradwell

Co-Founder and Chief Technology Officer 

David is a co-founder and Chief Technology Officer of Ambri. As a co-inventor of Ambri's liquid metal battery, David received the prestigious TR35 award from Technology Review, rated as one of the world’s top 35 innovators under 35.

David leads the technical team to develop the liquid metal battery technology, with a determined focus on creating a low cost and effective storage technology to meet the strenuous performance and cost demands for bulk-energy stationary storage applications.

David has earned a B.Sc in Engineering Physics from Queen's University, and an M.Eng. and PhD in Materials Science and Engineering from Massachusetts Institute of Technology.


Donald R. Sadoway

Co-Founder, Chief Scientific Advisor and Board Member 

Donald R. Sadoway is the John F. Elliott Professor of Materials Chemistry in the Department of Materials Science and Engineering at the Massachusetts Institute of Technology. Born in Toronto, he obtained the B.A.Sc. in Engineering Science, the M.A.Sc. in Chemical Metallurgy, and the Ph.D. in Chemical Metallurgy, all from the University of Toronto. He has been a professor at MIT for over 40 years. The author of over 170 scientific papers and holder of 27 U.S. patents, his research is directed towards the development of rechargeable batteries for grid-level storage and environmentally sound technologies for the extraction of metals. In 2012 he was named by Time magazine as one of the 100 Most Influential People in the World.

Adam Briggs  

Chief Commercial Officer 

Adam’s career has spanned over three decades advancing new battery and fuel cell products to energy storage, consumer electronics, military and industrial markets.  After 17 years with Duracell, where he led its OEM sales and consulting group,  Adam was president of Millennium Cell and CEO of Acumentrics – each fuel cell technology developers and manufacturers.  Most recently as the Chief Commercial Officer of NEC Energy Solutions, he led the capture of over 150MW of grid scale energy storage projects.  Through these experiences in which he has achieved success operating and living around the world, Adam has gained knowledge to identify attractive new markets and establish strong collaborative partnerships.


Patrick Song  

VP of Corporate Development 

Patrick is the VP of Corporate Development of Ambri. Patrick is responsible for finance, human resources, and business operations. Prior to joining Ambri, Patrick led the finance departments at three leading clean technology companies where he executed on over $500 million in capital formation funding a company from lab stage R&D through the construction of a commercial scale plant and the sale of two of these companies to Fortune Global 500 companies. Patrick earned his BA in Economics and MA in International Policy Studies from Stanford University and an MBA from Harvard Business School.