International
- The Association for Preservation Technology International
- International Working Party for Documentation and Conservation of Buildings, Sites and Neighbourhoods of theÊModern Movement
- International Council on Monuments and Sites
- UNESCO's World Heritage Center
National
- Advisory Council on Historic Preservation
- American Association for State and Local History
- U.S. Working Party for Documentation and Conservation of Buildings, Sites and Neighbourhoods of the Modern Movement
- The Heritage Education Network
- National Alliance of Preservation Commissions
- National Park Service Cultural Resources
- National Register of Historic Places
- Technical Preservation Services for Historic Buildings
- Preservation Information for Certified Local Governments
- The National Trust for Historic Preservation
- National Preservation Institute
- Society of Architectural Historians
- Organization of American Historians
- Society for American Archaeology
State
- Heritage Resource Center
- National Trust for Historic Preservation Western Regional Office
- Regional Chapter of the Society of Architectural Historians
- Washington State History Museum
- Washington State Office of Archaeology & Historic Preservation
Local