1. Director (P.I.). National Research Laboratory for Molecular Medicine, Yonsei Medical School, Seoul, Korea. 2003-2008. 2011-2016, 2016-Present. 2. 2009.03-08. Visiting Senior Professor. Indiana University, Bloomington, Indiana, USA. 3. Full Professor of Department of Biochemistry and Molecular Biology, Yonsei Medical School, Seoul, Korea. 2006-Present. 4. Associate Professor of Department of Biochemistry and Molecular Biology, Yonsei Medical School, Seoul, Korea. 2001-2006. 5. Assistant Professor of Department of Biochemistry and Molecular Biology, Yonsei Medical School, Seoul, Korea. 1995-2001. 6. Post-Doctoral Associate. Department of Molecular Biophysics and Biochemistry. YALE University, CT, USA. 1993-1995. 7. Teaching Assistant and Research assistant. Department of Biochemistry and Molecular Biology, Indiana University School of Medicine 1986-1993.

1. Regulation of Eukaryotic Gene Expression 2. Transcriptional Regulation by Oncogenes and Tumor Suppressors 3. Functional Genomics of Transcription Factors-Knock Out Mice 4. Regulation of Cell Cycle and Development 5. Molecular Medicine: Molecular Basis of Disease 6. Metabolism