From 1991 to 2017, Alfredo served as Ambassador of Venezuela to the US, UK, Spain, Brazil, Chile, Ireland and Singapore, as well as Director of the Diplomatic Academy. An author or co-author of 35 books and numerous academic papers on international affairs, he was an Advisor to the Diplomatic Academy of London, Fulbright Scholar and two times Rockefeller Foundation Bellagio Center Resident Scholar. Selected as Simon Bolivar Chair Professor by the Council of Faculties of Cambridge University, he was also Director of the Center for North American Studies and Coordinator of the Institute for Higher Latin-American Studies at the Simon Bolivar University in Caracas, as well as a Visiting Professor at the universities of Princeton and Brasilia and an on-line Professor at the University of Barcelona.