Williams (PhD, 1972, University of La Plata, Argentina) is Researcher of the National Research Council (CONICET) since 1977, in the field of thermosetting polymers. Co-author of 2 books, 17 book chapters and 233 scientific articles. He gave opening, plenary and keynote lectures in international symposia held in the Americas and Europe. He was Professor at the Department of Chemical Engineering, University of Mar del Plata (1976-2016). He was organizer (1982) and first director (1982-86, 1988-94) of the Institute of Materials Science and Technology (INTEMA). Member of the Directory Board of CONICET (1997-99). He is Fellow of the National Academy of Exact, Physical and Natural Sciences (ANCEFN, Argentina), since 2009, President of the Engineering Section (2012-16) and President of the Academy since 2016. In 2011, he received the Presidential Award (Investigador de la Nación), the maximum distinction given to a scientist in Argentina.