Hyperbolic geometry and geometric topology
Symmetric space and rigidity of group action
Surface group representation and invariant theory

1997 ~ 2000 KAIST, Professor
2000 ~2008 Seoul National University, Professor
2000 ~ present Korea Institute for Advanced Study, Professor
2014 ~ 2015 Visiting professor at Stanford University
2015 ~ 2018.05 Visiting professor at UC Berkeley
2004 ~ 2005.02 Professeur Invite at Ecole Polytechnique. Paris
2006 ~ 2006.08 Invited Professor at Universidad Complutense, Madrid
2013 ~ 2013.12 Professeur Invite at CNRS, Paris 6, Jussieu
2013 GU guest professor, Chalmers University, Sweden
2004 Professuer Invite at Universite de Grenoble I

2007 Young Scientist Award
2016 KAST FILA basic science award
2017 Monthly scientist award