BA in Metallurgical Engineering, Seoul National Univ.; PhD in Materials Science and Engineering, Univ. of California, Berkeley. Former: Adjunct Prof., Dept of Mechanics and Materials Science, Rutgers Univ.; Senior Technical Staff, Exxon Corporate Research Centre, Exxon Research and Engineering Co.; Managing Director, Pohang Iron and Steel Co., Korea; Breakthrough Innovation Adviser and Distinguished Science Associate, ExxonMobil Corporate Strategic Research Centre, ExxonMobil Research and Engineering Co. With SK Innovation: 2008, President, Corporate Planning and Global Technology; 2009, President and CEO; since 2013, Vice-Chairman and CEO.