Ryan serves as Chief Executive Officer and President of Proterra, the leading innovator of zero-emission, battery-electric buses. Prior to Proterra, he was a General Partner at Kleiner Perkins Caufield & Byers where he joined in April 2010. Prior to KPCB, Ryan was an early employee of Tesla Motors where he was instrumental in the successful capitalization of the company and the commercialization of its first-in-kind Roadster.
Ryan is a member of the California League of Conservation Voters Green Advisory Council. He has served in the U.S. Army, received a BA from the College of William & Mary and an MBA from Harvard University.