János Pach is Research Adviser at Rényi Institute, Budapest and Head of the Laboratory of Combinatorial and Geometric Structures at MIPT, Moscow. His main fields of interest are discrete and computational geometry, convexity, and combinatorics. He has written more than 300 research papers. His books, “Research Problems in Discrete Geometry” (with Brass and Moser) and “Combinatorial Geometry” (with Agarwal) were translated into Japanese, Russian, and Chinese. He is co-editor-in-chief of Discrete & Computational Geometry and serves on the editorial boards of ten other professional journals. For his scientific achievements, he has received several prices, including the Lester R. Ford Award from the Mathematical Association of America (1990), the Rényi Prize and the Academy Award from the Hungarian Academy of Sciences (1993, 1998). He was elected ACM Fellow (2011), member of Academia Europeae (2014), and AMS Fellow (2015). He was invited speaker at the International Congress of Mathematicians in Seoul (2014).