Greiner-Maltz Company of Long Island was founded by William Greiner and Richard Maltz in 1953 and has focused on commercial, industrial, and retail real estate since its early years. The company provides leasing, selling, appraising, consulting, negotiation, representation, property management, and development-related services across the New York–New Jersey metropolitan market. Current materials also describe a broader platform that includes office, investment, and industrial property work in areas such as Manhattan, Brooklyn, Queens, Long Island, New Jersey, Westchester, and Connecticut. The company presents itself as a specialized real estate firm built around market knowledge, proprietary data, and long-standing brokerage experience.