Chairman of the department of biomedical and chemical sciences at Hyupsung University. Toxicology and Stem Cell Biology, Oncology, M.S. in Public Health (Tufts University) and Ph.D. in Environmental and Reproductive Toxicology (Michigan State University), 20 years of research experience in (in vitro and in vivo) toxicology of stem cell research Lab. (hepatotoxicity, neuronal toxicity, cardiac toxicity using primary human cells and human pluripotent stem cell-derived somatic cells etc), 8 years of postdoctoral training in Stem Cell & Tissue Regeneration Unit and developing theranostic anticancer drug at Korea University and 2 years of R&D manager in Nexcel Inc, specialized in hepatic, neural, and cardiac toxicity), and 9 years of academic and research experience in Korea Univ. as a research professor of Biotechnology (Stem cell technology, specialized in hepatic toxicity of cell- and mouse-based screening system).