Welcome to my website.
I am currently a full professor in the Department of Mathematics at UC San Diego in La Jolla, California.
I received my PhD from Cambridge University in the Department of Pure Mathematics and Mathematical Statistics - DPMMS - under the supervision of Professor Andrew Thomason, after completing Part III of the mathematical tripos.
In the last ten years I have held academic, teaching or research positions at the University of Washington, Microsoft Research Redmond (Theory Group), University of Waterloo (Department of Combinatorics and Optimization), McGill University (Department of Mathematics). Most recent sabbaticals were IPAM (UCLA), the Mittag-Leffler Institute (Stockholm) and ETH (Zurich).
From 2015 to 2017, I served as program director in Division of Mathematical Sciences at the National Science Foundation. I serve as Editor-in-Chief of the Journal of Combinatorial Theory, Series A, and Managing Editor of Journal of Combinatorics. I am currently the Graduate Vice-Chair in the Department of Mathematics at UCSD.