Teaching assistant, College of Pharmacy, Ewha Womans University, Seoul, Republic of Korea, 2001
Research assistant, College of Pharmacy, Ewha Womans University, Seoul, Republic of Korea, 2003
Postdoctoral fellow, The Research Institute of Pharmaceutical Sciences, College of Pharmacy, Ewha Womans University, Seoul, Republic of Korea, 2007.04~2008.06
Scientific Officer, Herbal Evaluation Team, Korea Food and Drug Administration, Seoul, Republic of Korea, 2008.06~2009.03
Postdoctoral fellow, Department of Thoracic / Head & Neck Medical Oncology, The University of Texas M. D. Anderson Cancer Center, Houston, Texas, USA, 2009.07~2011.02
Senior Researcher, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, Republic of Korea, 2011.04~2015.0
Research Assistant Professor, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, Republic of Korea, 2015.04~2016.06
Research Assistant Professor, BK21 program for Global translational research of molecular medicine and biopharmaceutical science, 2016.07~present