Thornton Tomasetti is a leader in engineering design, investigation and analysis serving clients worldwide on projects of all sizes and complexity. With practices in building structure, building skin, building performance, construction support services, property loss consulting and building sustainability, Thornton Tomasetti addresses the full life cycle of a structure. We have supported clients working in more than 50 countries, with projects that include the tallest buildings and longest spans to the restoration of prized historic properties. Founded in 1956, today Thornton Tomasetti comprises more than 800 engineering and architectural professionals who collaborate from offices across the United States and in Asia-Pacific, Europe and the Middle East.