Structural engineer Robert Sinn is a Principal in the Chicago office of Thornton Tomasetti. Before joining TT in 2007, Bob spent more than two decades at SOM, 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. Recent project credits include the 245-meter Federation of Korean Industries headquarters (2014) in Seoul, South Korea, the Al Wasl Plaza for Expo 2020 in Dubai, UAE, topped by a translucent dome that spans 130 meters.