GBI Board of Directors

The Green Building Initiative (GBI) is governed by a multi-stakeholder board of directors featuring representatives from industry, NGOs, construction companies, architectural firms, and academic institutions. Each board member has one vote, so no single entity or individual has more control than any other. Our board members are industry leaders who provide direction for the Green Building Initiative and its staff, but these board members have no influence over the certifications themselves as the certifications are derived from the consensus-based ANSI process.

Nominate A Board Member

If you would like to nominate someone to be considered for GBI’s Board of Directors, let us know by completing the below nomination form, and if you are interested in joining GBI’s Board of Directors, please complete the Board Application to share your interest areas and expertise.

Tim Thiel

Global Circular Economy Manager

Chair, Green Building Initiative

Tim Thiel currently works in Sustainability Transformation and the Circular Economy at Covestro. In this role, his focus is to help achieve the corporate mission of making Covestro truly sustainable & fully circular. He focuses on the implementation of Covestro’s strategy towards a Circular and Climate-neutral Economy. As of 2024, he is a 25-year veteran […]

Alison Hoagland


Chair Elect

Alison Hoagland, an Architect and Principal at Mackenzie, has designed and delivered projects in a variety of markets, including retail, commercial, hospitality, educational, industrial, and public safety facilities. Alison is passionate about sustainable architecture, and has led many of Mackenzie’s LEED projects, and worked to develop Mackenzie’s Building Science Committee. She is a Green Globes […]

Amlan Mukherjee, Ph.D., P.E.

Sustainability Director
WAP Sustainability Consulting

Immediate Past Chair

Amlan Mukherjee is a Director of Sustainability at WAP Consulting following 18 years as a Professor of Civil Engineering at Michigan Tech. He has an extensive background in life cycle assessment for construction materials and has facilitated the development and implementation of the Environmental Product Declaration (EPD) for the North American asphalt industry. He has […]

Luis Perez-Soto

VP Treasurer
Lennar Financial Services


Luis Perez-Soto graduated from the University of Miami and he is a Certified Public Accountant and Certified Treasury Professional with significant experience in corporate finance, structure financing, SEC regulations, corporate accounting, and public accounting. Prior to his current role at Lennar Corp. as Vice President and Treasurer for the mortgage operations (Lennar Mortgage), Luis worked […]

Meagan Sykes

Energy Manager


Growing up near the Great Smoky Mountains National Park in Tennessee, Meagan relocated to Halifax, Nova Scotia, Canada in 2016. She graduated Magna Cum Laude in Environmental Studies with a concentration in Statistics from Maryville College. Meagan has sustainability and project management experience in both governmental and higher education settings. Her experience in both the […]

Keely Felton

Keely Felton

Chief Sustainability Officer
Nova Group, GBC

Keely Felton is the Chief Sustainability Officer at Nova Group, GBC.  Keely has over 12 years of experience in the energy efficiency and sustainability field, with a focus on commercial real estate.  In her role at Nova, she directs Nova’s Strategic Energy Group. The team supports debt clients with due diligence services that meet requirements […]

Consolato Gattuso

Director of Engineering
Piedmont Office Realty Trust

Consolato (Cons) Gattuso has over 30 years’ experience in engineering, design, and operations and brings extensive leadership in real estate, commercial property, and technical consulting industries to the GBI Board. In his current role, he is responsible for developing, implementing, and enhancing engineering standards. Prior to joining Piedmont Office Realty Trust, Cons served as Senior […]

Dain Hansen

Executive Vice President, Government Relations
International Association of Plumbing and Mechanical Officials (IAPMO)

Dain Hansen is the Executive Vice President, Government Relations at the International Association of Plumbing and Mechanical Officials (IAPMO) where he oversees international, federal legislative, and state policy initiatives impacting the plumbing industry in the U.S. and abroad. Dain also serves on the executive management of IAPMO’s nonprofit arm, the International Water, Sanitation and Hygiene […]


John Lister

JL Architects

John Lister began his professional career with the internationally acclaimed firm of Skidmore, Owings and Merrill in Los Angeles. After contributing to the firms of Edward H. Fickett, FAIA, The Harris Design Group and Robinson Willis, he started John W Lister, Architect in 1988. Originally a regional firm, JL Architects became a national firm by […]

Randy Mortensen

Sr. Vice President, Global Sales and Marketing

Randy Mortensen began his career in Tinley Park, IL at Panduit Corp. as a new product engineer designing cable ties. From there, moved on to roles in product management and general management in their Network Systems division in the Chicago Area. He represented Panduit in the standards bodies at the TIA/EIA as well as the […]

Brenda Steinhauer

Quality Manager
W.A. Richardson Builders, LLC

Brenda has over 30 years of experience in construction and code development and holds a Bachelor’s in Construction Technology and a Master’s in Public Administration. She has worked in both the government regulatory and the private sectors. While working for Clark County Department of Building and Fire Prevention, she was the Inspection Manager of a […]

Sumayyah Theron

CEO and Founder
Avant-garde Sustainable Solutions

Sumayyah Theron is a sustainability expert with 20+ years of experience in sustainable building design, project management and green building certifications, Sumayyah Theron oversees the development and execution of comprehensive carbon reduction strategies and counsels clients on sustainable practices, green building certifications and emerging trends. She was named to Engineered Systems’ “20 to Watch: Women […]

Doug Tucker

Director, Industry and Government Relations
Mitsubishi Electric

Doug Tucker, a 30-year veteran in the fields of standards development, conformity assessment, and regulatory policy of HVAC&R equipment, at Mitsubishi Electric US Cooling & Heating (MEUS) as Director of Industry and Government Relations. In this role, he represents the interests of MEUS with federal, state and local governmental organizations, with industry trade groups and […]

Simon Turner

Building Cognition

In 1987 Simon Turner joined Healthy Buildings – a small consulting firm which specialized in indoor air quality. The firm grew to be a pioneer and leader in the field, helping commercial real estate owners and managers become leaders of their own in the field of indoor environmental performance. Simon earned a LEED AP credential […]

Laura Unrei

Laura Unrein

Sustainability Project Manager
Group14 Engineering

Laura Unrein has over 15 years of experience in the building industry including 10 years at Group14 Engineering where she currently works as a sustainability project manager. Laura has her bachelor’s in environmental science from Indiana University and her master’s in construction management from Colorado State University making her a valuable resource for design & […]

Jay Thomas

Vice President Sustainability, Executive Director
Vinyl Institute, The Vinyl Sustainability Council

Emeritus Director Jay Thomas serves as the Vice President of Sustainability for the Vinyl Institute and the Executive Director of the Vinyl Sustainability Council. In these roles he is responsible for developing and implementing the strategies and tactics that support the sustainability mission and policies of the Vinyl Institute. Through the Vinyl Sustainability Council, Jay […]

Ray Tonjes

Ray Tonjes Builder

Emeritus Director Ray Tonjes is the President and founder of Ray Tonjes Builder, Inc., a homebuilding company based in Austin, Texas which specializes in mainstream, high performance custom homes and renovations. Ray has been a proponent of energy efficient construction since the energy crisis of the 1970’s. In 1985, he became one of the first […]