Brewster is CFO of EcoVapor Recovery Systems (ERS), a venture-backed cleantech company serving the oil & gas industry based in Denver, Colorado. Prior to ERS, Brewster was Director of Finance for CleanLaunch, Colorado’s cleantech business incubator in partnership with the National Renewable Energy Lab. Brewster has previous experience in venture capital, environmental policy, and management consulting. While at the Erb Institute, Brewster was active with the Zell Lurie institute and the Frankel Fund. He also coauthored the book Hybrid Organizations: New Business Models for Environmental Leadership. He earned his Bachelor’s degree from Middlebury College in economics and environmental studies.