I am a research director at INRIA, the French Research Institute of Computer Science and Applied Mathematics, and an invited professor at the Collège de France on the Chair Informatics and Computational Sciences.

My research interests are in Computational Geometry and Topology. This includes geometric data structures, Voronoi diagrams, triangulations, randomized algorithms, robust computing, motion planning, mesh generation, non-linear manifold learning, high dimensional geometry, topological data analysis.

I successively founded and led two project-teams, Prisme (1987-2002) and Geometrica (2003-2015). I am currently a member of the DataShape team and the principal investigator of the ERC project GUDHI (Geometric Understanding in Higher Dimensions).

I am serving as associate editor of the Journal of the ACM and of Discrete and Computational Geometry.