I am a fellow at the center for mathematical challenges at the Korea institute for advanced study in Seoul.
Previously, I was the principal investigator of a Swiss national science foundation grant "Ambizione" at the Ecole Polytechnique Federale de Lausanne in Switzerland.
I work in the area of topological and combinatorial group theory. My work so far concerns concepts such as amenability, finiteness properties of groups, and Tarski numbers. I have studied various families of groups acting on the circle, such as groups of piecewise projective homeomorphisms. My recent work has been focused on the construction and study of finitely generated and finitely presented simple groups of homeomorphisms of 1-manifolds.