One World Trade Center was engineered by WSP USA (formerly WSP Cantor Seinuk), a multidisciplinary firm with over 30,000 staff worldwide. WSP’s portfolio includes some of the world’s most iconic skyscrapers and several of Manhattan’s most ingenious structures, including Two, Three, and Seven World Trade Center; 217 West 57 Street (Central Park Tower); 432 Park; One57; 8 Spruce Street; and the Hearst Tower.