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Our People

Robert Sinn

P.E., S.E., FACI, F.ASCE, FIABSE Principal


Robert Sinn is widely recognized for his innovative engineering of large, complex structures around the world. He has more than 35 years of experience in the structural design, analysis and management of a range of project types, from long-span structures to tall and supertall towers. His project credits include the 245-meter Federation of Korean Industries headquarters in Seoul, South Korea, the Al Wasl Plaza for Expo 2020 in Dubai, UAE, which is topped by a translucent dome that spans 130 meters, and Saudi Arabia’s Jeddah Tower, the world’s next tallest building and the first man-made structure to reach a height of one kilometer. Prior to joining Thornton Tomasetti, Bob spent more than two decades at Skidmore, Owings & Merrill LLP, where he was responsible for such award-winning projects as the Guggenheim Museum Bilbao in Spain, and Trump International Hotel and Tower in Chicago, which when completed was the tallest all-concrete building in North America. Bob is a fellow of the American Concrete Institute, the American Society of Civil Engineers and the International Association of Bridge and Structural Engineering.


M.S., Civil Engineering, Massachusetts Institute of Technology

B.S., Civil Engineering, Northwestern University

Bob is a prolific and award-winning writer, having authored more than 60 papers and articles on innovations in structural engineering, building materials and system design.