Dynamical systems
- Ph.D. in Mathematics, Yale University, Advisor: Gregory Margulis, 1997
- B. S. in Mathematics, Seoul National University, Korea, 1992
- Oklahoma State University: Visiting Assistant Professor, 1997-1998
- The Hebrew University of Jerusalem: Golda Meir Postdoctoral Fellow ,1998-1999
- Princeton University: Assistant Professor, 1999-2003
- Institute for Advanced Study: Member, 2002-2003
- California Institute of Technology: Professor, 2006-2007, Associate Professor with tenure, 2003-2006
- Brown University: Professor, 2006-June 2013
- Yale University: Professor, July 2013-Feb. 2015
- Yale University: Abraham Robinson Professor of Mathematics: March 2015-present
- Lady Davis Postdoctoral fellowship: 1998-1999
- NSF grants: 1997-1998, 2000-2003, 2003-2006, 2006-2011, 2011-2014
- Plenary lecture at AMS Central sectional meeting, Texas, April 2005
- Plenary lecture at the 1st Joint International Meeting of AMS and KMS, Dec 2009
- Invited lecture at International Congress of Mathematicians, Hyderabad, India, Aug 2010
- Plenary lecture at AWM’s celebration of Women in Mathematics: 40 Years and Counting, Sep 2011
- Joint AMS-MAA invited address at 2012 Joint Mathematics meeting, Boston, Jan 4-7, 2012
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- , Korea Institute for Advanced Study
- 85 Hoegiro Dongdaemun-gu, Seoul 02455, Republic of Korea.