Bachelor of Science, Seoul National University, 1987. Master of Science, Oregon State University, Corvallis, 1992. Doctor of Philosophy, Iowa State University, Ames, 2001.
Research assistant Oregon State University, Corvallis, 1988—1992. Research scientist Korea Forest Research Institute, Seoul, 1993—1995. Research assistant Iowa State University, Ames, 1995—2001.
Plant molecular biologist United States Department of Agriculture - Agricultural Research Service-Plant Sciences Institute, Beltsville, Maryland, since 2001.
Member of American Society Plant Biologists.