Before joining KU as a faculty, he worked as a postdoctoral researcher at National Renewable Energy Laboratory (NREL) and a full-time lecturer of Mechanical Engineering at Stanford University. He received the B.S. degree in Mechanical and Aerospace Engineering from Seoul National University in 2002. He also received the M.S. and Ph.D. degree in Mechanical Engineering from Stanford University in 2004 and 2009 respectively. His research interest has been in devleopment of innovative ceramic fuel cells including solid oxide fuel cells (SOFCs) & protonic ceramic fuel cells (PCFCs) and ultra-thin film fabrication processes such as atomic layer deposition (ALD) and aerosol-assisted chemical vapor deposition (AACVD).