Thornton-Tomasetti Group, from 12 offices across the United States and with locations in Hong Kong, Moscow and Shanghai, provides multidisciplinary design services to building industry clients throughout the world on projects of all sizes. Founded in New York City in 1956 as Lev Zetlin & Associates, a preeminent and innovative building structural engineering firm, the company has grown into a 450-person organization with multiple offices and strategic alliances worldwide. It offers clients comprehensive, as well as highly specialized, professional design services through its three divisions while maintaining a reputation for technical pioneering and excellence. Thornton-Tomasetti has been involved in some well-known projects, from the tallest buildings in the world in Malaysia and Taiwan to state-of-the-art sports and entertainment complexes across the United States. Thornton-Tomasetti Group has also worked on landmark building restoration design and critical disaster response investigations worldwide. Thornton-Tomasetti Group has an office in Chicago.