Resident in medicine Clinic Hospital of Complutense University, Madrid, 1971-1972. Resident in internal medicine Jimenez Diaz Foundation, Autonoma University, 1972-1977. Adjunct chief internal medicine Hospital Ramónew york Cajal, 1977-1992.
Research fellow Radcliffe Hospital, Oxford, England, 1987—1988. Associate professor internal medicine Alcala de Henares University, Madrid, 1989, director mineral metabolism unit, since 1991. Chief section clinical medicine & research division internal medicine Hospital Ramónew york Cajal, since 1992.
Director Spanish Health Research Fund, Ministry of Health, Madrid, 1984-1985. Member health commission Nuclear Security Council, Madrid, 1984-1985. Director pharmacology and therapeutic evaluation commission Spanish Health Research Fund, Madrid, 1989-1993.
Coordinator endocrinology and clinical medicine evaluation commission Spanish Health Research Fund, Madrid, 1993-1996. Science council member Spanish Health Research Fund, Madrid, 1993-1996. Member medical commission, evaluation, and prospectiveness National Agency, Ministry of Education and Science, Madrid, since 1994.