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Mark Wilhelm

  • AP-O&M Certified
  • AP-Homes Certified
Tempe, AZ

Mark has devoted over three decades to renewable energy and to energy efficient and sustainable building design, planning and operations. Mark is a LEED AP O+M and a Certified Energy Manager.

As Corporate Director, Sustainability and Climate Neutrality Initiatives for Ameresco, Inc. Mark serves as cross-company sustainability liaison and implements sustainability strategies for clients who are committed to achieving climate neutrality goals. Mark leads Ameresco’s unique Climate Neutrality Alliance with Arizona State University through a team with Rocky Mountain Institute and National Renewable Energy Laboratory to define and implement strategies that will achieve net zero GHG emissions and climate neutrality for ASU by 2035.

Before joining Ameresco, Mark was a founding Principal of Green Ideas, Inc., where he led green building project management and consulting services for over a decade. Mark and his team served as sustainability consultants for over 100 LEED, green building, and sustainable development projects representing over 38 million square feet of building space; over 70 of these projects earned LEED certification, with two-thirds at the Gold or Platinum level. Mark worked with large corporations, universities and government entities to develop climate action plans and market transformation strategies for the green economy. He has trained over 7,000 professionals worldwide in sustainable design and construction and delivers courses to help professionals earn LEED AP, Green Associate, Certified Energy Manager, and Sustainable Building Advisor accreditation.

Mark was a founding member and past Chairman of the USGBC Arizona Chapter. He Chaired the USGBC Greenbuild 2009 Host Committee and is a past Director and founding Co-Chairman of the USGBC West Region Council. He also spent 17 years in the electric utility industry with the Electric Power Research Institute (EPRI) and Arizona Public Service Company (APS). From 1998 to 2002 Mark served as the Commercial and Mass Markets Product Line Leader and eBusiness Alliance Manager for EPRI, which is the premiere R&D organization for the electric power industry. He also served as Director of Practitioner Communities for a vertical e-business portal alliance with EPRI and SAIC and helped to establish the International Process Control Systems Cyber Security Forum with KEMA Consulting.

From 1992-1995, while at APS, Mark directed the development of a world-class technology transfer project, the APS Environmental Showcase Home (ESH). This sustainable residence was designed to consume 85% less energy and 60% less water than a typical home, while showcasing over 150 sustainable technologies, strategies and materials. Over 40,000 people toured the home, which received 26 major environmental awards, including an international award in 1997 as the Top Environmental Project in North America. The ESH spawned an eight-part PBS television series titled “This New House” and a book titled “The Environment Comes Home”. A case study for this landmark project is available at the U.S. Department of Energy EERE Building Database -

Mark holds a BA in Economics from the University of Massachusetts at Amherst and an MS in Environmental Planning from Arizona State University with a focus on energy-efficient building design, solar energy technology, and building energy simulation.