He came into contact with neotropical flora in the Royal Botanical Garden of Madrid through the historical herbaria of Mutis, Ruiz and Pavón e Isern (from Colombia, Peru, Chile and Ecuador), awaking his interest in the flora of this region and of the Scrophulariaceae family in particular.
He moved to Colombia en 1986 to work as an intern and in 1987-1990 as a Cooperating Botanist at the AECI, in the "Flora Project of the Royal Botanical Expedition of the New Kingdon of Granada", at the Institute of Natural Sciences at the National University of Colombia.
From 1991 to 2009, he was a professor and research officer at the Institute of Natural Sciences, Faculty of Science at the National University of Colombia in Bogotá, training new biologists in the field of vegetable taxonomy and Colombian flora.
At the Institute, he was curator of the National Colombian Herbary from 1996 to 2000 where he collaborated with other regional herbaries from other universities around the country, which contain many of his collections of vascular plants. In 2009 he became lead scientist at the CSIC at the Royal Botanical Garden of Madrid, to work on vegetable biodiversity in tropical areas.
^"Estudios en Labiatae VII. Salvia Yukoyukparum, Nueva Especie y Primer Representante de la Sección Tomentellae en Colombia". Novon: A Journal for Botanical Nomenclature (in Spanish) 18 (1): 38–42. 2008. doi:10.3417/2006062.