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The Society of Industrial and Office REALTORS® is the leading professional commercial and industrial real estate association. With more than 3,000 members in 580 cities in 26 countries, the Society represents today's most knowledgeable, experienced, and successful commercial real estate brokerage specialists.

The Society certifies its members with the prestigious SIOR (specialist, industrial and office real estate) designation, a professional symbol of the highest level of knowledge, production, and ethics in the real estate industry. Real estate professionals who hold the SIOR designation are recognized by corporate real estate executives, commercial real estate brokers and agents, lenders, and other real estate professionals as the most experienced and capable practitioners in any market.

A professional affiliate of the National Association of REALTORS®, the Society is dedicated to the practice and maintenance of the highest professional and ethical standards. The Society maintains a commitment to business and industry by providing outstanding professional services, publications, and educational programs.