1995.03~2020.08 인하대학교 사학과 교수
2020.09~현재 인하대학교 명예교수
2020.12~현재 동북아역사재단 제6대 이사장

February 1995~August 2020: Professor of History at Inha University
Since September 2020: Professor Emeritus of Inha University
Since December 2020~: President of the Northeast Asian History Foundation