Mark Wilhelm's picture

Mark Wilhelm


Managing Consultant

Tierra Resource Consultants, LLC


Mark has 34 years of experience in the energy industry, including 17 years in the utility sector and 20 years in sustainable building design, construction, and operations. His consulting experience spans all customer segments and includes engagements in organizational strategy, program development, and implementation. As a Managing Consultant at Tierra Resource Consultants, Mark combines this experience with his passion to develop transformational energy efficiency, renewable energy, and carbon reduction strategies for clients.

Mark recently served as the chief sustainability executive for Ameresco, where he managed internal corporate sustainability initiatives and delivered carbon neutrality consulting services to clients. At Ameresco Mark led a strategic alliance with Rocky Mountain Institute to develop a comprehensive roadmap to drive Arizona State University (ASU) to climate neutrality by 2035. This landmark roadmap defined a pathway for ASU to achieve sustainability goals at a lower net present cost than the Business-As-Usual scenario.

Mark has consulted on 70 MSF of high-performance buildings and developed 40 MW of solar energy systems. He has directed LEED certification for 80 projects, 2/3 of which earned Gold- or Platinum-level certification. He has trained over 6,000 professionals in sustainable design, construction, and operations and addressed over 100 audiences worldwide. He founded two successful sustainability consultancies, including Green Ideas, Inc., which became one of the first LEED Proven Provider firms in the world.
At the Electric Power Research Institute (EPRI), Mark managed $20 million of collaborative R&D in energy efficient building technology and served as EPRI’s e-Business Strategic Alliance Manager. He also held many leadership roles at Arizona Public Service Company (APS), where he directed the development of the world-renowned APS Environmental Showcase Home.
Mark has held leadership positions with the USGBC, AEE, EEI, and EPRI. He Chaired the 2009 Greenbuild Conference and Expo in Phoenix. He serves on the Industrial Advisory Board for ASU’s Professional Science Master’s degree program in Solar Energy Engineering & Commercialization.

Mark holds a BA in economics from the University of Massachusetts at Amherst and a professional Master’s degree in environmental planning from Arizona State University. He is a Certified Energy Manager (CEM), a Certified Carbon Reduction Manager (CRM), and a LEED Accredited Professional, Operations and Maintenance (LEED AP O+M).

In 2017 Mark was named a Top 50 Energy Manager in North America by Business Sector Media’s Energy Manager Today Magazine.