• Architects:

• American Institute of Architects
• American Society of Landscape Architects
• Architectural Institute of Japan

• Engineers:

• American Consulting Engineers Council
• American Society of Civil Engineers
• American Society of Heating, Refrigerating, and Air-Conditioning Engineers
• American Society of Mechanical Engineers
• Architectural Engineering Institute
• Asociacion de Ingeneros Estructurales (Argentina)
• Association of Iron and Steel Engineers
• Canadian Society for Civil Engineering
• Consulting Engineers and Land Surveyors of California
• Council of American Structural Engineers
• Illuminating Engineering Society of North Americ
• Institute of Electrical and Electronic Engineer
• Institute of Professional Engineers New Zealand
• Institution of Civil Engineering - (UK)
• Japan Society of Civil Engineers
• Light Gauge Steel Engineers Association
• National Council of Examiners for Engineering and Surveyin
• National Council of Structural Engineering Association
• National Society of Professional Engineer
• Society of Fire Protection Engineers
• Structural Engineers Association International

• Fire Prevention:

• Hazardous Materials Responders & Educators Association
• International Association of Fire Chiefs
• International Association of Fire Fighters
• National Association of State Fire Marshals

• Geologists:

• Geological Society of America
• Association of Engineering Geologists

• Inspectors:

• American Society of Home Inspectors
• International Association of Electrical Inspectors
• National Board of Boiler and Pressure Vessel Inspectors
• National Institute of Building Inspectors

• Interior Designers:

• American Society of Interior Designers
• California Council for Interior Design Certification

• Planners:

• American Planning Association
• APA Los Angeles Section
• APA California Chapter

Research Organizations

• Applied Technology Council
• Building Seismic Safety Council
• California Universities for Research in Earthquake Engineering (CUREe)
• Canadian Association of Earthquake Engineering
• Earthquake Engineering Research Institute
• Incorporated Research Institutions for Seismology(IRIS)
• Multidisciplinary Center for Earthquake Engineering Research
• National Earthquake Hazards Reduction Act National Information Service for Earthquake Engineering
• New Zealand National Society for Earthquake Engineering
• Pacific Earthquake Engineering Research (PEER) Center 
• SAC Joint Venture
• Seismology Society of America
• Southern California Earthquake Center
• Western States Seismic Policy Council

• Other:

• Civil Engineering Research Foundation
• Gas Research Institute
• National Institute of Standards and Technology

• American National Standards Institute
• American Society for Nondestructive Testing
• American Society for Testing and Materials
• Canadian Standards Association
• Construction Specifications Institute
• Factory Mutual
• ISO - International Organization for Standardization
• Underwriters Laboratories