1978~ Professor, Chonnam National University
1980~1983 Senior Researcher, Rural Development
Administration
1986~ Executive Director, Asian-Pacific Weed Science Society
1989~1993 Senior Reseaecher, National Honam Agricultural
Experiment Station, R.D.A
1993~1995 Guidance Director, Chonnam Agricultural Research
& Extension Service
1996~1998 President, Chonnam Rice Technical Working Group
1996~1997 Dean of Academic Affair, Chonnam National
University
1996~ Planning Secretary, Chonnam Provincial Goverment
1998~ President, Korean Society of Agricultural System
1998~ President, Korean Society of Weed Science
1998~ Dean of College of Agriculture, Chonnam National
University

1996 6th Science &Technology Outstanding thesis Award
1997 Chonnam Provincial Government Culture Award(in Science)
Reseach Studies on the enzymes of the porphyrin pathway and
development of gerbicideresistant crops through gene
manipulation