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Mr. Sakellaris is the President and Chief Executive Officer, as well as the Chairman of the Board of Directors of Ameresco, Inc. (NYSE:AMRC), a leading North American energy efficiency and renewable energy company headquartered in Framingham, MA. A visionary and entrepreneur, Mr. Sakellaris founded Ameresco in April 2000. He aspired to build an entirely product-neutral and supplier-independent energy company that had the skills, capabilities and foresight to create independent energy solutions that went beyond just conservation; one that addressed a customer’s entire energy stream including supply and demand, energy efficiency and renewable energy. Early in his career, Mr. Sakellaris worked at the utility New England Electric System (NEES), where he welcomed the challenge to establish NEES Energy, a company that would promote energy efficiency, thereby avoiding the need to build new power generation plants. Mr. Sakellaris then purchased the business known as NEES Energy in 1991 and renamed it NORESCO. He built NORESCO into a an industry-leading independent energy services company before selling it to Equitable Resources in 1997, where he continued to lead NORESCO and was also appointed as a Senior Vice President of Equitable Resources (NYSE:EQT), a Fortune 500 Energy Company. Today, Mr. Sakellaris leads Ameresco, a public company, employing over 900. Ameresco continues to grow and thrive, and currently supports 63 offices in 34 states and five Canadian provinces. Ameresco combines a North American footprint with strong local operations. Specialties: Mr. Sakellaris’ dedication and influence in promoting energy efficiency dates back to his involvement with the Electrical Power Research Institute (EPRI) where he championed the development of demand side management (DSM) programs that were widely implemented across the country. Additionally, he was a founding member of the National Association of Energy Service Companies (NAESCO) where he served as the first president and advocated for the new industry.

F. Nicholas Grasberger serves as Chairman, President and Chief Executive Officer, to which he was appointed in August 2014. Before that, he served as Senior Vice president and Chief Financial Officer from April 2013 to November 2014, and President and Chief Operating Officer from April 2014 to August 2014. Mr. Grasberger joined Harsco in 2013 from Fenner Plc, where he served three years as the Managing Director of their multinational Precision Polymers Division. Prior to Fenner, Mr. Grasberger served in increasingly responsible roles at Armstrong World Industries, first as Senior Vice President and Chief Financial Officer and later as Executive Vice President, where he concurrently served as President of Armstrong's Building Products division. He has also held positions as VP and Chief Financial Officer for Kennametal, Inc. and as Corporate Treasurer and director of the corporate planning process at H. J. Heinz Company. He started his career with USX Corporation. Mr. Grasberger holds a Bachelor of Business Administration from the University of Notre Dame and an MBA from the University of Pittsburgh.

Cynthia B. Taylor has served as a member on AT&T's board of directors since 2013. Ms. Taylor is President, Chief Executive Officer and a Director of Oil States International, Inc. (a diversified solutions provider for the oil and gas industry in Houston, Texas) and has served in this capacity since 2007. She previously served as Oil States International, Inc.’s President and Chief Operating Officer from 2006 to 2007 and as its Senior Vice President-Chief Financial Officer from 2000 to 2006. Ms. Taylor was Chief Financial Officer of L.E. Simmons & Associates, Inc. from 1999 to 2000 and Vice President-Controller of Cliffs Drilling Company from 1992 to 1999, and prior to that, held various management positions with Ernst & Young LLP, a public accounting firm. She received her B.B.A. in accounting from Texas A&M University and is a Certified Public Accountant.

Grady Walker is a Pres:Chart Industries Distribution & Supply at CHART INDUSTRIES INC and President at FIRST WAVE MARINE INC and is based in Bellaire, Texas. He has worked as Ops Supervisor at Lynne Daniels, Chief Executive Officer and Director at Hudson Products Corp, and President Distribution & Storage Western Hemisphere at CHART INDUSTRIES INC. Grady studied at NC State University between 1978 and 1982.

Robert Armentano is a President and Chief Executive Officer at Total Energy Solutions and is based in North Salem, New York.