- A/E/C Job Bank – Building Industry Employement from BuildFind
- American Institute of Architects (National)
- American Institute of Architects, California Council (AIACC)
- American Institute of Architects, Orange County
- American Planning Association – Los Angeles Section
- American Planning Association
- American Resort Development Association
- American Society of Landscape Architects
- Architectural Guild – USC
- Architects USA – Listing services for architects
- The Blue Book – The Construction Information Network
- Building Owners and Managers Association
- Building Team.com – news, codes, projects and career resource
- Business Development Association of Orange County (BDA/OC)
- California Building Industry Association
- California Department of General Services – California State Contracts
- Commerce Business Daily – education and leads government contracting professionals
- Construction Market Data Listing of US Architecture Firms – Listing of US Architecture Firms
- Engineering New Record – a construction market place
- International Association of Corporate Real Estate Executives
- International Facility Management Association
- International Council of Shopping Centers
- International Development Research Council
- Metropolitan Water District of Southern California
- The National Association of Home Builders
- National Association of Industrial and Office Properties
- R.S. Means Project Cost Calculator
- SMPS Inland Empire – The Society for Marketing Professional Services
- Society for College and University Planning
- U.S. EPA’s Brownfields Program
- Urban Land Institute, Los Angeles District Council
- Urban Land Institute, National
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