Ameresco, Inc. engages in the provision of energy services, including energy efficiency, infrastructure upgrades, asset sustainability, and renewable energy solutions for businesses and organizations throughout North America and Europe. It operates through the following segments: U.S. Regions, U.S. Federal, Canada, Non-Solar Distributed Generation (DG), and All Other. The U.S. Regions, U.S. Federal, and Canada segments offers energy efficiency products and services, such as design, engineering and installation of equipment and other measures to improve the efficiency and control the operation of a facility's energy infrastructure; and renewable energy solutions and services. The Non-Solar DG sells electricity, processed renewable gas fuel, heat or cooling, produced from renewable sources of energy, other than solar, and generated by small-scale plants; and operations and maintenance services for customer owned small-scale plants. The All Other segment focuses on the provision of enterprise energy management services, consulting services, and integrated-photovoltaic. The company was founded by George Peter Sakellaris on April 25, 2000 and is headquartered in Framingham, MA.