He received his Ph.D. degree in bioorganic chemistry from the College of Natural Sciences, Seoul National University, Seoul, Republic of Korea, and worked as a Postdoctoral Fellow at Columbia University, New York, NY, USA, and at Lawrence Livermore National Laboratory, Livermore, CA, USA, in order to extend his research experience to the areas of molecular biology and toxicology and of cancer etiology and pharmacology. He also worked in industry as a research fellow. His current research program is mainly based on organic and biological chemistry of functional molecules and materials, with ultimate goals of drugs and biomarkers development. He has served as an editorial board member and a reviewer of peer-reviewed journals in the areas of chemistry, cancer biology, and toxicology.