2021 ~ current      Assistant Professor, Department of Physics and Astronomy, Sejong University, Korea

2017.03 ~ 2021.02  Research Professor, Department of Physics and Astronomy, Sejong University, Korea

2015.10 ~ 2017.02  BK Research Professor, Department of Physics, Sogang University, Korea

2014.07 ~ 2015.09  Research Fellow, Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN) and School of Chemistry, Trinity College Dublin (TCD), Ireland

2012.09 ~ 2014.05  Research Staff Member, Materials and Device Research Center, Samsung Advanced Institute of Technology (SAIT), Samsung Electronics, Korea

2006.09 ~ 2012.08  Research Assistant, Center for Quantum Metrology Device, Korea Research Institute of Standard Science (KRISS), Korea