Sergio O. Angel is a Ph.D. from the University of Buenos Aires (Argentina). After completing a postdoc at the Center for Molecular Biology Severo Ochoa, University of Madrid, Spain, in Carlos Alonso's laboratory, he joined the researcher's career at the National Research Council (CONICET) in Argentina (1996). Soon after, he began directing the Toxoplasmosis laboratory at the Malbran Institute, City of Buenos Aires. In 2004, he joined the staff of the Instituto Tecnológico Chascomús (INTECH), in the city of Chascomús, Province of Buenos Aires. Since then, he has directed the Molecular Parasitology Laboratory on issues related to cellular and molecular biology in Toxoplasma, as well as studies associated with diagnosis and epidemiology in collaboration with the Hospital of this city. Since INTECH is part of CONICET but also of the National University of General San Martin (UNSAM), he has become a Full Professor in the Agrobiotechnology career, teaching Molecular Biology. His interest in toxoplasmosis includes the epigenetic mechanism in the regulation of gene expression, the DNA damage repair mechanism and its association with DNA replication stress, as well as the role of genes and transcripts of the subtelomeric region, in all cases in Toxoplasma.