I joined Oak Ridge National Laboratory in Feb 2012 as a postdoctoral research associate, transited into a staff member in Sept 2013. My current research focuses on data analysis methods and systems. I obtained PhD in computer science and engineering from Penn State in 2012, under the guidance of Dr. Chita R. Das. I obtained my Master's degree in 2000 and bachelor's degree in 1998, both from Seoul National University, Korea. Between PhD and Master's degree, I worked as a software engineer at Samsung electronics from Feb 2000 to Aug 2005.