• Acoustics: National Council of Acoustical Consultants
• Affordable Housing: Southern California Association of Non-profit Housing  Habitat for Humanity/ Long Beach - South Bay
• Archaeology: Archaelogical Conservancy  Society for American Archaeology
• Architects/Designers: American Institute of Architects(AIA)   AIA California Council  AIA Los Angeles Chapter  AIA Orange County Chapter  AIA Pasadena and Foothills Chapter  AIA San Fernando Valley Chapter  American Institute of Building Designers  American Society of Landscape Architects  Architectural Institute of Japan  Council of Landscape Architectural Registration  National Council of Architectural Registration Boards 
• Energy Conservation: California Association of Building Energy Consultants  Environmental Building News  Green Resource Center  Saving By Design  U.S. Green Building Council  U.S. Department of Energy (Sustainable Building Technical Manual)   Whole Building Design Guide
• Engineers:  American Association of Engineering Societies  American Consulting Engineers Council  American Society of Civil Engineers  American Society of Civil Engineers, Los Angeles Section American Society of Heating, Refrigerating, and Air-Conditioning Engineers  American Society of Heating, Refrigerating, and Air-Conditioning Engineers SoCal Chapter  American Society of Mechanical Engineers  American Society of Plumbing Engineers  Architectural Engineering Institute  Asociacion de Ingeneros Estructurales (Argentina)   Association of Energy Engineers  Association of Iron and Steel Engineers  Association of Professional Engineers and Geoscientists of British Columbia Canadian Society for Civil Engineering  CERF  Consulting Engineers and Land Surveyors of California   Council of American Structural Engineers  Engineering Virtual Library   Illuminating Engineering Society of North America  Institute of Electrical and Electronic Engineers  Institute of Professional Engineers New Zealand  Institution of Civil Engineers - (UK)  Institution of Structural Engineers (UK)  Japan Society of Civil Engineers   Light Gauge Steel Engineers Association  National Council of Examiners for Engineering and Surveying  National Council of Structural Engineering Associations  National Society of Professional Engineers  Professional Engineers in California Government  Society of Fire Protection Engineers  Society of Hispanic Professional Engineers  Structural Engineers Association International (virtual association thru SEAOC)
• Environmental/Health:  American Public Health Association   California Indoor Air Quality Program Groundwater Resources Association  Home Ventilating Institute  National Center for Healthy Housing  National Lead Information Center
• Forensics: Homeowners Against Deficient Dwellings
• Fire Prevention:  California Professional Firefighters  Hazardous Materials Responders & Educators Association  Fire Inspectors Association of Indiana  Greater Los Angeles Regional Fire Academy  International Association of Fire Chiefs International Association of Fire Fighters  National Association of State Fire Marshals  Western Fire Chiefs Association  United States National Fire Academy
• Geologists:  American Geological Institute  Association of Engineering Geologists  Geological Society of America  International Erosion Control Association
• Inspectors:  American Association of Code Enforcement  American Construction Inspectors Association - Antelope Valley
  Chapter  American Society of Home Inspectors  California Association of Code Enforcement  California Real Estate Inspection Association  International Association of Electrical Inspectors  National Academy of Building Inspection Engineers  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   National Kitchen and Bath Association - Southern California Chapter
• Planners:  American Planning Association  APA Los Angeles Section  APA California Chapter  California Housing Law Project  California Land Use Planning Information Network  California Preservation Foundation  Center for Understanding the Built Environment  Congress for the New Urbanism  Future Cities  Housing California  International Dark-Sky Association  League of California Cities Planning and Community Development Department  Local Government Commission  National Building Museum  National Council for Preservation Education  National Trust for Historic Preservation (U.S.A.)  Redondo Beach Preservation Program  Smart Growth Network
• Public Works: American Public Works Association (APWA) - High Desert Branch  Municipal Equipment Maintenance Association (MEMA)
• Risk Managers/Insurance:  Institute For Business & Home Safety Insurance Services Office
• Surveyors/ GIS: American Congress on Surveying and Mapping  Association of American Geographers
• Miscellaneous: California Association of Public Information Officials

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