Associate Professor, Department of Applied Statistics, Chung-Ang University, Seoul, Korea September 2022 -- Present

Assistant Professor, Department of Applied Statistics, Chung-Ang University, Seoul, Korea March 2015 -- August 2022

Assistant Professor, Department of Mathematics and Statistics, University of South Florida, Tampa 33620, USA August 2007 -- August 2013

Lecturer, Department of Mathematics, Seoul National University, Seoul, Korea March 1996 -- August 1997