Ameresco, Inc. Completes Acquisition of Quantum Engineering and Development, Inc.

Framingham, MA – Ameresco, Inc. (NYSE: AMRC) confirmed today that it has completed the purchase of Quantum Engineering and Development, Inc., an energy service company active in Oregon and Washington. Quantum is currently serving the Portland, Oregon public schools, the State of Washington, and a number of schools, cities and towns throughout Washington State.

“We are delighted the acquisition has been completed, and we are happy to have the Quantum team join the Ameresco family. With the additional talent and resources, we will continue to focus on delivering outstanding results and innovative, energy-saving solutions for our customers,” said George P. Sakellaris, president and chief executive officer of Ameresco.

Quantum will be renamed Ameresco Quantum, Inc., and will lead Ameresco’s efforts in the Northwestern United States. Quantum’s employees will join Ameresco’s current workforce of more than 650. Working with Ameresco Quantum, customers can benefit from Ameresco’s comprehensive energy services including energy efficiency, energy saving performance contracts, energy supply and risk management, energy infrastructure services, renewable energy and carbon management, and Ameresco AXIS, Ameresco’s data and invoice management platform.

About Ameresco, Inc.
Ameresco, Inc. was incorporated in Delaware in April 2000 and is a leading independent provider of comprehensive energy efficiency solutions for facilities throughout North America. Ameresco’s solutions include upgrades to a facility’s energy infrastructure, and the development, construction, and operation of renewable energy plants. With corporate headquarters located in Framingham, MA, Ameresco has 55 offices in 29 states and four Canadian provinces. In July 2010, Ameresco completed its initial public offering. For more information, visit www.ameresco.com.

About Quantum Engineering and Development
Quantum Engineering and Development is an energy service company located in Washington State. Quantum provides energy and water auditing, engineering, construction and commissioning services to public, commercial and industrial clients. Since 1999, Quantum has delivered over $63 million in energy and water conservation projects to public and private clients, and has built a reputation for engineering and customer service excellence. For more information, visit www.quantum-engr.com.