NAI Global is a global commercial real estate brokerage firm focused on buying, leasing, selling, financing and managing commercial property. Find commercial real estate services and property investment strategies.A global commercial real estate services leader, we will never settle for the world that's been built, but relentlessly drive it forward.. A commercial real estate broker is the expert intermediary between landlords and tenants. Colliers is the leading diversified professional services and investment management company. Work with us to accelerate your success! We underwrite a wide range of occupancies on an excess and surplus lines basis for risks domiciled in the US and Canada, including incidental global exposures. Savills is one of the world's largest commercial real estate brokerage firms, and Savills North America has been operating since 1954. Kidder Mathews is now the largest fully independent commercial real estate firm in the Western US with over 900 professionals in 19 offices across 6 states. Kidder Mathews is now the largest fully independent commercial real estate firm in the Western US with over 900 professionals in 19 offices across 6 states.