Néstor Y. Rojas is an Associate Professor at the Department of Chemical and Environmental Engineering of Universidad Nacional de Colombia at Bogota since 2006. He graduated from the same university with a degree in Chemical Engineering in 1996. After graduation, he worked for two years in a malting plant and in an environmental NGO. Then, he obtained a Ph.D at the Department of Fuel and Energy of the University of Leeds in the UK (2002). Back in Colombia, he worked at Universidad de Los Andes for 3.5 years before his current position. His research interests lie in the area of air quality, including urban particulate matter, source apportionment, emission inventories and exposure measurements. He served as an IGAC AWG member from 2013 to 2020, where he was a co-chair for 2 years. He's a co-chair at the Air Quality and Health Impacts session of the IGAC 2021 conference.