Cazzulo is professor of protein biochemistry at the Instituto de Investigaciones Biotecnologicas, Universidad Nacional de General San Martin, and Investigador Superior, National Research Council, Argentina. His previous positions include: Head of the Laboratory of Biochemistry of Parasites at the Fundacion Instituto Leloir, Buenos Aires, and Head of the Research Department, Instituto Nacional de Parasitologia Dr. Mario Fatala Chaben, Argentinian Health Ministry, Buenos Aires. His work has focused on the metabolism of Trypanosoma cruzi, the cause of Chagas' Disease. His honours include: Doctor Honoris Causa (Medicine), University of Uppsala, Sweden; Medal of the Rector, Universidad de Chile, Santiago; and Dr. A.O.M. Stoppani Prize in Biochemical Parasitology, Argentinian National Academy of Sciences. He is a member of the Latin American Academy of Sciences.