Chemical Engineer from Universidad Nacional de Colombia, Bogotá (1996). Ph.D. from the University of Leeds, UK in 2002. Assistant Professor at Universidad de Los Andes between 2002 and 2006. Associate Professor 2006-2024 and Full Professor since 2024 at Universidad Nacional de Colombia. My research focuses on air quality and includes the chemical characterization of particulate matter in ambient air and in emissions from various sources; the determination of the contribution of pollution sources; the estimation of pollutant emissions inventories; exposure to particulate matter in microenvironments; and the estimate of impacts of air pollution on public health. Fulbright visiting researcher at the University of Wisconsin - Madison in 2015, working on source apportionment at Prof. James Schauer's lab. Director of the Air Quality Research Group and a member of the scientific committee of the IGAC - International Global Atmospheric Chemistry - project.