In 1970, he took a degree in Medicine and Surgery at Complutense University (Madrid). From 1970 to 1975, he got a post as a resident doctor at Puerta de Hierro Clinic in Madrid (Autonomous University of Madrid) and was nominated as assistant doctor of Internal Medicine in 1975. From 1975 to 1977, he enjoyed a scholarship in the United States and improved his studies. From 1977 to 1984 he was the head of the section at 'Ramón y Cajal' Hospital, where he founded the Unit of Infectious Diseases in the Microbiology Service. Nowadays he is the head of the Clinic Microbiology Service at 'Gregorio Marañón' Hospital (Madrid) and Professor of Clinic Microbiology in a post at Complutense University linked to ‘Gregorio Marañón’ University Hospital.
He is on the editorial staff of several publications such as: 'Enfermedades Infecciosas y Microbiología Clínica', 'Revista de Farmacología Clínica y Experimental y Terapéutica', 'Inflamación y Dolor', 'Revista Iberoamericana de Micología', 'Revista Clínica Española',... He has been a Professor in many postgraduate courses, first at 'Ramón y Cajal' Hospital, then at 'Gregorio Marañón' Hospital. From 1990 to 1999, he has directed twenty-three doctoral theses.
He is a member of the Spanish Society of Internal Medicine, Spanish Society of Microbiology, Spanish Society of Infectious Diseases and Clinic Microbiology, Spanish Society of Chemotherapy, Argentinian Society of Clinic Microbiology (honourable member), Spanish Association of Mycology, American Society for Microbiology and so on. From 1987 to 1993, he edited the magazine 'Enfermedades Infecciosas y Microbiología Clínica'. In 1990, he was elected member and secretary of the National Commission of Microbiology and Parasitology and one year later Foreign Fellow Member (Infectious Disease Society of America). In 1994, he founded the Study Group on AIDS, dependent of the Spanish Society of Infectious Diseases and Clinic Microbiology. In 1995, he was elected member of the executive committee of the European Society of Clinical Microbiology and Infectious Diseases (nowadays he is the general secretary of this institution). He was awarded several prizes such as the Research Prize of Roussel Scientific Institution (1992) and 'Manuel Moreno López' Prize of the Spanish Society of Infectious Diseases and Clinic Microbiology. He married Carmen Burgaleta Alonso de Ozalla in 1971 and has three children. He likes Spanish History, cycling and collecting antique pens.