Biography: I entered Korea University in 1988 and majored physics. I joined University of Rochester in 1993 as a graduate student working on a particle physics experiment called Dzero at Fermilab in US. I received my Ph.D in 1997 and went to Seoul National University in order to take military duty as a Korean citizen, working on initial (=painful or joyful?) stage of the dark matter experiment. Also, till 2002, I worked on the Belle experiment in Japan. I then moved to Harvard University as a research associate working on the BaBar experiment from 2002. I returned to Korea University as an assistant professor of physics in the fall of 2004. Here is my outdated CV.