Jay is one of America’s most widely respected energy technologists. About half of his career was spent at E Source, where for many years he ran the company’s research department. As a member of the management team, he played an important role in purchasing the company, quadrupling its size, and selling it in 2019. Since the sale, he continues to write and advise nonprofits. He also continues to affiliate with E Source, where he holds the title of Senior Fellow Emeritus.