"Family business, A. Epstein & Sons, an engineering firm that hired architects. They specialized for many years in industrial parks but extended their work to highrise office buildings after WW II . Epstein's firm was included in the consortiums that built the Mies van der Rohe-designed Federal Center in Chicago, the Maine Montparnasse Tower in Paris, and the Harold Washington Public Library in Chicago. From a small family-owned and -run business Epstein's firm, now A. Epstein & Sons, International, has grown to an international company with offices worldwide."