Headquartered in Philadelphia, Pennsylvania with additional offices in New York, New Jersey, and Florida, O’Donnell and Naccarato is a leading structural engineering firm with 200+ engineers specializing in high-rise buildings, healthcare facilities, educational institutions, and transit infrastructure. Founded in 1965, the firm has provided structural design services for major projects across the eastern United States including university buildings, hospital towers, transit stations, and government facilities. O’Donnell and Naccarato is recognized for expertise in concrete and steel hybrid structural systems, seismic design, and structural systems for complex architectural geometries with exposed structural elements.