Thornton Tomasetti is an international leader in engineering design, investigation and analysis. They serve clients worldwide on projects of all sizes and complexity. The firm’s Chicago office is located on the 15th floor of Mies van der Rohe’s 330 North Wabash (formerly IBM Plaza). The LEED-Gold space designed by Garofalo Architects in collaboration with Powell/Kleinschmidt features generous open areas, flexible conference rooms and enclosed offices. Floor-to-ceiling windows provide stunning views of the Chicago River, Lake Michigan and many of the city’s architectural gems.