Kollár’s main interest is algebraic geometry, especially the moduli spaces of varieties, rationally connected varieties and the minimal model program. He also likes to explore related topics in algebra, complex analysis, differential geometry and computer science. He is a professor of mathematics at Princeton University and a member of the Hungarian Academy of Sciences, the National Academy of Sciences, the American Academy of Arts and Sciences. He was previously chair of the program committee of the 2018 International Congress of Mathematicians in Rio de Janeiro. He received the Cole Prize in 2006, the Nemmers Prize in 2016 and the Shaw Prize in 2017.