Trained in Immunology in Spain (A Arnaiz-Villena), France (G Hauptmann, D Cohen, J Dausset), Germany (DJ Schendel) and USA (C Terhorst). Held a clinical diagnostic position as certified immunologist at Hospital 12 de Octubre (Madrid) before joining the Complutense University School of Medicine. Has a long-term interest in T lymphocyte physiopathology and immunodeficiency and is a well-known expert in T cell receptor immunodeficiencies. Is presently Full Professor of Immunology at the Department of Immunology, Ophthalmology and ENT of the Complutense University School of Medicine in Madrid, where he is Vice-Dean for Research and PhD Studies and Head of the Lymphocyte Immunobiology group at the Hospital 12 de Octubre Health Research Institute. Served as President of the Spanish Society for Immunology (2012-16), serves on the Scientific Advisory Board of the Centre for Chronic Immunodeficiency (Freiburg), and evaluates grants for the European Research Council, the German Federal Ministry of Education, the French Fondation pour la Recherche Médicale, the Italian Ministry for Education, University and Research and the Colombian Science Research Program. Has a proved training record of postdocs, PhD students and technicians in both a clinical and an academic environment, and belongs to one of the best Immunology teaching Departments in Spain for graduate and postgraduate students. Currently working also in oncoimmunology (immunotherapy of Sézary syndrome).