1995.4-2008.2 : Director of Environment Research Division, Kyonggi Research Institute
2008.3-2016.9 : Professor, Dept. of Landscape Architecture, College of Bio-Science, Dankook University
2017.2-present : Research Professor, College of Life Science & Biotechnology, Korea University
1995.4-2008.2 : Director of Environment Research Division, Kyonggi Research Institute
2008.3-2016.9 : Professor, Dept. of Landscape Architecture, College of Bio-Science, Dankook University
2017.2-present : Research Professor, College of Life Science & Biotechnology, Korea University