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
• Select Energy Services in 2006
• Southwest Photovoltaic in 2007
• Global Energy in 2007

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.


Select Energy Services, Inc. (SESI). Founded in 1982, SESI was a fully-integrated energy-services company and a nationally respected leader in energy-efficiency engineering. SESI provided comprehensive energy engineering, efficiency, design, installation, and maintenance services, as well as water improvement systems, to a wide range of government and private-sector clients. SESI was pre-qualified by the Department of Energy and the Department of Defense and developed projects valued at more than a total of $1.0 billion.


Southwest Photovoltaic (SWPV) was founded in 1986 and was one of the original Authorized Distributors in North America for Solarex Corporation, a wholly owned subsidiary of Amoco Corporation. Solarex had developed many cost saving manufacturing innovations centered on its patented SEMIX polycrystalline cell delivering the first significant cost savings for volume manufactured PV modules in North America. SWPV was then able to take the Solarex product line of PV modules and develop many new customers and innovative off grid applications within the industrial and rural electrification emerging markets within North America.

Then, in 1996 Amoco Corp. was merged into British Petroleum (BP) thus creating one of the largest PV module manufacturing and technology companies in the world. SWPV thus became a BP Solar Distributor and in 2002 was named a Premier Distributor for BP Solar. In 2006, SWPV was named the largest volume distributor for BP Solar in North America.

Southwest Photovoltaic is now known as Ameresco Solar.


Global Energy was a leading renewable energy distribution corporation. They built a strong relationship with their clients by offering excellence in the design and supply of renewable energy products. They offered turnkey system sizing and integration of balance of systems.

Global Energy is now known as PV Energy Solutions.