History

Ameresco was founded by George Sakellaris, industry pioneer and founder of two previous successful energy services companies. His vision was a company that would be quick, flexible, and independent. One that offered a broad range of services and delivered on its promises. A company with an entrepreneurial spirit dedicated to customer satisfaction.

Three major acquisitions have fueled Ameresco's aggressive growth strategy:

• Citizen's Conservation Services in 2000
• DukeSolutions in 2002
• LG & E Enertech in 2003
• E·Three in 2003
• Planergy Housing in 2004

Citizens Conservation Services, established in 1981, is the nation's preeminent energy services company (ESCO) serving private and public multifamily properties. Since the group was first capitalized in 1995, current Citizens staff have implemented contracts with project capital of over $64 million - more than any other North American ESCO in this sector. Citizens' personnel have improved 30,000 households under performance-based energy and water services contracts, from California to New York.


DukeSolutions, the former energy management subsidiary of Duke Energy, was established in 1997 to serve end-user needs in a deregulating energy marketplace. DukeSolutions was one of the industry leaders in providing ownership, operation and maintenance of utility systems in North America - one of the few energy services providers with a significant customer base of Fortune 500 industrials and commercials. DukeSolutions' acquisitions included two highly regarded, long established firms:

Energy Investment, a New England-based independent nationwide energy consulting and project management firm, founded in 1973

TESCOR, the leading performance contracting firm in Canada, also founded in 1973

Ameresco and its component companies have successfully completed energy solutions projects for approximately 300 customers involving over 9,000 facilities and resulting in substantial energy and operating cost savings.


Enertech, a former ESCO subsidiary of LG & E Energy, was founded in 1995. With customers that include industrial, commercial, educational and healthcare facilities, Enertech has become a leader in the educational and healthcare market, focusing its services primarily in the mid to southeast region and provides comprehensive service to upgrades and building modernization.


E·Three, formerly a Sierra Pacific Resources company, was founded in 1997 and is an energy consulting and services company with offices in Nevada and California serving the Western States. E·Three also did business as E·Three Custom Energy Solutions in Las Vegas, and independent Energy Consulting, Inc. in California.