Ameresco, Inc. engages in the provision of energy solutions in the United States, Canada, and Europe. The company operates through North America Regions, U.S. Federal, Renewable Fuels, Europe, and All Other segments. It offers energy efficiency, infrastructure upgrades, energy security and resilience, asset sustainability, and renewable energy solutions for businesses and organizations. The company also designs, develops, engineers, and installs projects that reduce the energy, as well as operations and maintenance (O&M) costs of its customers' facilities; and projects primarily include various measures customized for the facility and designed to enhance the efficiency of building systems, such as heating, ventilation, cooling, and lighting systems. In addition, it offers renewable energy solutions and services, such as the development and construction of small-scale plants that the company owns or develops for customers that produce electricity, gas, heat, or cooling from renewable sources of energy and O&M services; and sells electricity, processed renewable gas fuel, and heat or cooling produced from renewable sources of energy. Further, the company provides photovoltaic (PV) solar energy products and systems, as well as provides consulting, and enterprise energy management services. It serves the federal, state and local governments, utilities, data centers, educational and healthcare institutions, housing authorities, and commercial and industrial customers. Ameresco, Inc. was incorporated in 2000 and is headquartered in Framingham, Massachusetts.