Earlier in his career, JJB worked at CERMAV-CNRS, Grenoble, 1986 (Predoc); Univ. Zurich (Switzerland), 1987 (Postdoc); National Institute for Medical Research (UK) 1988 (Postdoc; and Carnegie Mellon Univ., USA; 1990-92 (Postdoc and visiting). After working at IQOG-CSIC (1992-2002) as tenured and senior research scientist (1996), he held a CSIC Research Professor position at CIB-CSIC since 2002. He has also held Visiting Professorships at École Normale Supérieure, Paris (2004), Univ. Pierre et Marie Curie, Paris VI, (2009), and Univ. Milano-Bicocca (2010-12). From the management perspective, he was the President of the Royal Society of Chemistry of Spain (Jan 2012-Jan 2018), and was Secretary General of the same Institution (2004-11).