Ameresco gives its customers alternative ways to cut their energy bills. Primarily serving commercial and industrial customers, along with municipal and federal government agencies, Ameresco provides development, engineering, and installation services to clients seeking to upgrade and improve the efficiency of their heating and air conditioning, ventilation, lighting, and other building systems. Other services include developing and constructing small-scale, on-site (or near-site) renewable energy plants for customers, as well as installing solar panels, wind turbines, and other alternative energy sources. Founded in 2000 by CEO George Sakellaris, Ameresco operates through 65 locations in the US, Canada, and Europe.