2017 – Todayㅣ CEO, PRAZEN
2009 – 2015 ㅣ Principal Research Engineer, C-lab Samsung Electronics
2008 – 2009 ㅣ RLE/Visiting Scientist, MIT
2003 – 2008 ㅣ Samsung Advanced Institute of Technology
2002 – 2003 ㅣPost Doctorial Fellow, Tokyo Institute of Technology
1997 – 2002 ㅣ Doctor, Physics, Korea University