I am an experimental particle physicist interesting on the fundamental building blocks of the universe. Broad range researches from underground detector to colliders have been pursued. Currently, I am responsible for dark matter search group of the center for underground physics at Institute for Basics Science and lead KIMS (Korea Invisible Mass Search) and COSINE dark matter search experiments that are running at Yangyang underground laboratory. I am also a member of CDF collaboration of Tevatron at Fermilab, which was shutdown at 2011, and of AMoRE neutrinoless double beta decay experiment.