1996 ~ present: 한동대학교 기계제어공학부 교수
2016 ~ present: POSCO 석좌교수
2013 ~ present: 한동대학교 산학협력단장
2013 ~ present: 산학연구인재개발처장
2004 ~ present: 포항시 건설 자문위원
2017 ~ 2020: MOLTEX (UK) 기술자문위원
2015 ~ 2018: 한국원자력학회 대구 경북 지부 지부장
2014 ~ 2018: 포항 TP 인사위원회 위원
2002 ~ 2003: Visiting Professor (Purdue University), School of Nuclear Engineering, collaborating with Professor M. Ishii
2002 ~ present: Evaluation Member of National Laboratory Program, KISTEP
2000 ~ present: Evaluation Member of KISTEP: Nuclear reactor safety and radiation protection research
2000 ~ 2001: primary chair of KISTEP: thermal-hydraulic Integral Test planning task force team
1999 ~ 2000: Special Staff for the Y2K problem in Korean Nuclear Power Plant (Uljin and Wolsong)
1997 ~ 1999: Consultant for Pohang city
1994 ~ 1995: Visiting Scholar (McMaster University), Dept. of Engineering Physics, collaborating with Prof. Jen-Shih Chang
1990 ~ 1996: Associate Professor at Cheju National University, Dept. of Energy Engineering
1988 ~ 1990 Full Time Lecturer at Cheju National University, Dept. of Energy Engineering
1986 ~ 1988: Research assistant for Prof. Hee Cheon No in KAIST, Dept. of Nuclear Engineering