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Dr. Lewis is Chairman/CEO of CTG Energetics, Inc., one of the leading energy efficiency and sustainability consulting firms in the United States. He is a registered professional engineer with more than 30 years of experience in engineering design and the analysis of energy-using systems in buildings. He has specialized experience in innovative building technologies, integrated design processes, and sustainable community planning. He is the engineer of record for over 25 million square feet of new construction and renovation projects for the public and private sectors. His projects have won numerous awards for energy efficiency and/or sustainability.

Dr. Lewis is active in the application of “sustainable design” to the design, construction and operations of “green buildings.” He has led CTG’s involvement in more than 150 LEED certified projects in the past fourteen years. He served as a member of the national Board of Directors of the U.S. Green Building Council from 1997-2002, as a member of the LEED Steering Committee from 2000 - present, as Chair of the LEED Technical & Scientific Advisory Committee from 2001-2009, and as the Chair of the LEED® Technical Committee, 2009-present. Dr. Lewis is actively involved in the development and evolution of the LEED Green Building Rating System.