American Society of Landscape Architects:  http://asla.org/

Texas Society of Landscape Architects:  http://www.texasasla.org/

American Society of Civil Engineers:  http://www.asce.org/

Texas Section of American Society of Civil Engineers: http://texasce.org/

Texas Recreation and Parks Society:  http://traps.org/

Greater Dallas Planning Council:  http://gdpc.org/