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Executive Committee
Coordinating Committee
Technical Core Committee
Technical Advisors
Participating Organizations


The Sustainable Sites Initiative™ (SITES™) program is a collaboration between the American Society of Landscape Architects, the Lady Bird Johnson Wildflower Center and the United States Botanic Garden in conjunction with a diverse group of stakeholder organizations.

American Society of Landscape Architects (ASLA)

Founded in 1899, ASLA is the national professional association for landscape architects, representing more than 17,000 members in 48 professional chapters and 68 student chapters. Landscape architecture is a comprehensive discipline of land analysis, planning, design, management, preservation and rehabilitation. ASLA promotes the landscape architecture profession and advances the practice through advocacy, education, communication and fellowship. Members of the Society use their "ASLA" suffix after their names to denote membership and their commitment to the highest ethical standards of the profession.

Lady Bird Johnson Wildflower Center

The Lady Bird Johnson Wildflower Center at The University of Texas at Austin is dedicated to increasing the sustainable use and conservation of native plants and landscapes. Founded in 1982 by Lady Bird Johnson, the former first lady, the Wildflower Center maintains an extensive native plant botanic garden and offers professional and adult education. The Wildflower Center also conducts research on landscape restoration and plant conservation at its 279-acre site, promoting the role of native plants in addressing ecological problems. Recent research initiatives focus on native turf grasses, green roof technology in a sub-tropical climate, prairie restoration methods including prescribed fire, the control of invasive species and ways in which native plants can aid in combating climate change in urban landscapes.

United States Botanic Garden (USBG)

Dating from 1820, the United States Botanic Garden (USBG) is one of the oldest botanic gardens in North America. The Garden informs visitors about the importance and fundamental value of plants to the well-being of humans, all nations, and our planet, and highlights the diversity of plants worldwide, as well as their aesthetic, cultural, economic, therapeutic and ecological significance. Formally placed under the jurisdiction of the Joint Committee on the Library of Congress in 1856, the U.S. Botanic Garden has been administered through the Office of the Architect of the Capitol in the Legislative Branch since 1934. With nearly a million visitors annually and located on the National Mall, the USBG strives to demonstrate and promote sustainable practices for individuals, organizations and institutions.

Executive Committee

American Society of Landscape Architects
Nancy C. Somerville, Hon. ASLA
Executive Vice President/CEO

Lady Bird Johnson Wildflower Center
at The University of Texas at Austin

Susan Rieff
Executive Director

Center for Sustainable Development
at The University of Texas at Austin
Fritz Steiner, Ph.D., FASLA
Dean, School of Architecture

United States Botanic Garden
Holly Shimizu
Executive Director


Coordinating Committee

This coalition of stakeholder groups will provide input on the direction and promotion of the SITES program

American Society of Civil Engineer's Environment and Water Resources Institute
Karen C. Kabbes, P.E., D.WRE
President, Kabbes Engineering, Inc.

American Society of Landscape Architects
Nancy C. Somerville, Hon. ASLA
Executive Vice President/CEO

American Nursery and Landscape Association
Robert J. Dolibois, CAE
Executive Vice President

City of Chicago
Aaron N. Durnbaugh
Deputy Commissioner
Department of the Environment
Natural Resources & Water Quality Division

Lady Bird Johnson Wildflower Center
Susan Rieff
Executive Director

National Association of County & City Health Officials
Karen R. Nikolai, M.P.H., M.C.P.
Community Design Liaison, Hennepin County

National Recreation and Park Association
Barbara Tulipane
Chief Executve Officer

Office of the Federal Environmental Executive, Council on Environmental Quality
William S. Garvey
Deputy Associate Director

Professional Landcare Network (PLANET)
Sabeena Hickman, CAE, CMP
Chief Executive Officer

The University of Texas at Austin
Center for Sustainable Development

Fritz Steiner, Ph.D., FASLA
Dean, School of Architecture

United States Air Force
Theodore Shierk, ASLA
Landscape Architect Subject Matter Specialist

United States Botanic Garden
Holly Shimizu
Executive Director

United States Environmental Protection Agency
Clark Wilson
Senior Urban Designer
Office of Smart Growth

United States General Services Administration
Les Shepherd, AIA
Chief Architect

United States Green Building Council
Deon Glaser
Director, LEED International Technical Development

United States National Park Service
Jan Burton, ASLA, RLA
Transportation Division, Denver Service Center























Technical Core Committee

An active group of professionals from diverse locations and backgrounds who provide technical expertise in
specific areas of focus.

José Almiñana, RLA, ASLA, LEED AP
Andropogon Associates, Ltd.

Nina Bassuk, Ph.D.
Professor and Program Leader
Urban Horticulture Institute
Cornell University

Steve Benz, PE, LEED Fellow, Hon. ASLA
Partner/Director of Green Infrastructure Services/Director of People and Operations

Jacob Blue, RLA, ASLA
Landscape Architect/Ecological Planner
Applied Ecological Services

Meg Calkins, ASLA, LEED AP
Assistant Professor of Landscape Architecture
Ball State University

Jenny Carney
YRG Sustainability

Michael Clar, P.E., D.WRE, CFM
Assistant County Engineer, Department of Land Use
New Castle County, DE

Sandy Dymale, ASLA, LEED AP BD+C
Associate Principal

Nora Goldstein
Executive Editor
BioCycle Magazine

Robert Goo
Environmental Protection Specialist
Office of Wetlands, Oceans and Watersheds
Office of Water
U.S. Environmental Protection Agency

Liz Guthrie, ASLA
Manager, Professional Practice Programs
American Society of Landscape Architects

Frances (Ming) Kuo, Ph.D.
Associate Professor and Director
Landscape and Human Health Laboratory
Department of Natural Resources & Environmental Sciences Department of Psychology
University of Illinois, Urbana-Champaign

David McDonald
Resource Conservation Planner
Seattle Public Utilities

Ray Mims
Conservation Horticulture & Sustainability
United States Botanic Garden

Mark Simmons, Ph.D.
Ecologist, Landscape Restoration Program
Lady Bird Johnson Wildflower Center

Jerry Smith, ASLA, LEED AP
Smith\GreenHealth Consulting, LLC

John C. Swallow, Ph.D., LSP
President and Director of Environmental Services
Pine & Swallow Environmental

Steve Windhager, Ph.D.
Executive Director
Santa Barbara Botanic Garden

David J. Yocca, ASLA, RLA, AICP, LEED AP
Principal Landscape Architect/Planner
Conservation Design Forum




















Technical Advisors

A group of professionals from diverse locations and backgrounds who have helped to inform the development of the SITES Rating System, and provide technical expertise on a case-by-case basis for the Pilot Program.

Eliot Allen, AICP, LEED AP-ND
Criterion Planners

Michael Barrett, Ph.D., P.E., D.WRE
Research Associate Professor
Center for Research in Water Resources
The University of Texas at Austin

J. Amy Belaire
LEAP Doctoral Fellow
Department of Biology
University of Illinois at Chicago

Kimberly Cochran, Ph.D.
Office of Environmental Policy
U.S. Department of State

Stephen Cook, ASLA, LEED AP O+M
Senior Landscape Architect
VIKA Maryland, LLC

Fred Cowett, Ph.D.
Department of Horticulture
Cornell University

Susan D. Day, Ph.D.
Assistant Professor of Urban Forestry
Department of Forestry & Environmental Conservation and Department of Horticulture
Virginia Tech

Deon Glaser, ASLA, LEED AP
Director, LEED International Technical Development
U.S. Green Building Council

Deb Guenther, ASLA

Len Hopper, FASLA
Senior Associate
Mark K. Morrison Associates LTD

William Hunt, Ph.D., P.E.
Assistant Professor and Extension Specialist
Biological and Agricultural Engineering
Urban Stormwater Management
North Carolina State University

Alison Kinn Bennett
Co-Chair, Green Building Workgroup
Office of Pollution Prevention and Toxics
U.S. Environmental Protection Agency

Nick Kuhn
Community Forestry Coordinator
Missouri Department of Conservation

Tom Liptan, RLA, FASLA
Landscape Architect/Environmental Specialist


Edward MacMullan
Senior Economist

Chris Martin, Ph.D.
Department of Applied Sciences and Mathematics
Arizona State University

James Patchett, ASLA, RLA, LEED AP.
Founder and President
Conservation Design Forum

Robert Ryan, Ph.D.
Associate Professor of Landscape Architecture
University of Massachusetts, Amherst

Jean Schwab
GreenScapes Program Manager
Office of Resource Conservation and Recovery
U.S. Environmental Protection Agency

Melanie Sifton
Vice President, Horticulture & Facilities
Brooklyn Botanic Garden

Laura Solano
Michael Van Valkenburgh Associates, Inc.
Landscape Architects

Eric Strecker, P.E.
Geosyntec Consultants

Rodney Swink, FASLA
Landscape Architect

Janice Thies, Ph.D.
Associate Professor of Soil Biology
Department of Crop and Soil Sciences
Cornell University

John Peter Thompson
Horticulture & Invasive Species Consultant
National Agricultural Research Alliance (NARA-B)

Megan Turnock, M.S., MLA
Lees & Associates Landscape Architects

James Urban, FASLA
Consultant, Lecturer
Owner, Urban Trees + Soil

Valerie Vartanian
United States Army

Heather Venhaus, ASLA
Environmental Designer/Consultant

Kathleen L. Wolf, Ph.D.
Research Social Scientist
College of Forest Resources
University of Washington




Participating Organizations

Professional, scientific, trade, academic, conservation and public agencies whose interests include the built and natural environment,  as well as commercial entities engaged in landscape design, construction and maintenance, are invited to join the Sustainable Sites Initiative program as Participating Organizations.  These organizations recognize the importance of creating, building, and managing landscapes that support environmental, economic, and human needs. 

Participating Organizations agree to:  

· Publicly support and promote the SITES program to their colleagues, members, constituents and clients.
· Review and provide comments on the SITES program's draft performance benchmarks and guidelines
· Inform their interested colleagues, members, constituents and clients about  opportunities for them to review and provide comments on the SITES program proposals.
· Provide information, research data, and other materials to the SITES program that can help inform future reports and expand the base of knowledge regarding sustainable sites.  
· Work with the SITES program to shift conventional landscape design, construction, and maintenance practices toward greater sustainability.

For more information, please contact participate@sustainablesites.org

Participating Organizations include the following:

American Horticultural Society
American Institute of Architects
American Nursery & Landscape Association
American Planning Association
American Public Gardens Association
Association of Professional Landscape Designers
Audubon International
Canadian Nursery Landscape Association

Canadian Society of Landscape Architects
Center for Urban Watershed Renewal
Council of Educators in Landscape Architecture
Council of Landscape Architectural Registration Board
Ecological Landscaping Association
Green Roofs for Healthy Cities
Interlocking Concrete Pavement Institute
International Erosion Control Association
Landscape Architecture Foundation
National Building Museum

Professional Grounds Management Society (PGMS)
Rails to Trails Conservancy
Sustainable Buildings Industry Council
Sustainable Urban Forests Coalition
Tree Care Industry Association, Inc.
Urban Land Institute
US Composting Council