Professor
Yonsei University, Republic of Korea
1991-1994 Lecturer, Department of Conservative Dentistry, Yonsei University, Seoul, Korea
1994-1996 Full-time lecturer, Department of Conservative Dentistry, Yonsei University, Seoul, Korea
1996-2001 Assistant Professor, Department of Conservative Dentistry, Yonsei University, Seoul, Korea
2001-2006 Associate Professor, Department of Conservative Dentistry, Yonsei University, Seoul, Korea
2006- Professor, Department of Conservative Dentistry, Yonsei University, Seoul, Korea