Dennis R. Costello
Managing Director, Braemar Energy Ventures

Dennis R. Costello is a Managing Director of Braemar Energy Ventures II and is a member of the Investment Committee. Mr. Costello has been an active venture capital investment professional for over twenty years. From 1990 to 2000, Mr. Costello was with Advent International, where he focused on early stage to later stage middle market companies. From 1995 to 2000, he served as the chief investment officer for the North American operations of Advent International. Mr. Costello is also a managing director in Rock Maple Ventures, an early stage technology venture fund in Boston. Prior to Advent International, Mr. Costello was a general partner of Zero Stage Capital of Pennsylvania, a venture capital partnership investing in early stage technology companies in Pennsylvania. Mr. Costello began his career in alternative energy with positions at Midwest Research Institute and a member of the original staff of the National Solar Energy Research Institute (?SERI?), now renamed the National Renewable Energy Laboratory (?NREL?). During that period, Mr. Costello published numerous papers and articles on the economic and market issues of solar energy commercialization. He is also the author of the Dow Jones Irwin book New Venture Analysis: Research, Planning, and Finance. Mr. Costello holds an MS degree in business from the Massachusetts Institute of Technology, where he was an Alfred P. Sloan Fellow. He also holds an MA in economics from Ohio State University and a BA in economics from the State University of New York (SUNY), College at Fredonia.