He received his B.A. and Ph.D. from the University of Toronto, and his M.A. from the University of Essex. Professor Díez has taught at the Institut d'Etudes Politiques de Paris (Sciences Po) and the University of Toronto and has been a Visiting Professor at the El Colegio de México, the Universidad Diego Portales in Santiago de Chile, and the University of California, San Diego. He held the 2014-15 Peggy Rockefeller Visiting Scholarship at Harvard University.