SIOR is the leading professional commercial and industrial world-wide real estate association. With more than 3,200 members in 562 cities in 20 countries, SIOR represents today's most knowledgeable, experienced, and successful commercial real estate brokerage specialists.

Vistage International and its global affiliates have 14,000 members in 16 countries, representing the world's largest CEO membership organization based on revenue. Members meet in small groups every month under the same guiding principles—to help one another make better decisions, achieve better results for their businesses, and enhance their lives. 

A Certified Commercial Investment Member (CCIM) is a recognized expert in the disciplines of commercial and investment real estate. A CCIM is an invaluable resource to the commercial real estate owner, investor, and user, and is among an elite corps of more than 9,000 professionals who hold the CCIM designation across North America and more than 30 countries.

Certified Commercial Investment Members are in more marketplaces in North America -- 1,000 cities -- than all major real estate companies combined. Regions and chapters provide designees and candidates the opportunities to promote business and educational goals through local and regional forums and meetings.

CoreNet Global is the world's leading professional association for corporate real estate and workplace executives serving leading multinational companies from the Fortune and Global 1000. More than 7,000 members manage over $1.2-trillion in real estate and workplace assets in Asia, Australia, Europe, Latin America and North America.

The Institute of Real Estate Management has been the source for education, resources, information and membership for real estate management professionals. An affiliate of the National Association of Realtors, IREM is the only professional real estate management association serving both the multi-family and commercial real estate sectors. With 80 U.S. chapters, eight international chapters and several other partnerships around the globe, IREM is an international organization that also serves as an advocate on issues affecting the real estate management industry.

Commercial Industrial Brokers Society – A Long Island association of commercial real estate practitioners formed:  To enhance communication within the Long Island commercial real estate brokerage community; To strengthen & unite the industry into a cohesive group while advocating the practice of professional standards; To secure & maintain a positive image while working to foster the economic development of our Island.