Thornton Tomasetti provides engineering services to clients worldwide on projects of all sizes and complexity, with practices in building structure, building skin and building performance. From the tallest buildings and the longest spans, to innovative building systems and materials, the firm is committed to creating the best solutions through technical ingenuity, pursuit of excellence, and responsiveness to client needs. Thornton Tomasetti is an award-winning 550-person organization of engineers and architects collaborating from offices across the United States and in Asia, Europe and the Middle East.