Satellite Remote Sensing
Atmospheric Composition Measurements
Air Quality

1991 ~ 2003 Principal Researcher/Senior Researcher, Space R&D Division, Korea Aerospace Research Institute (KARI)
2003 ~ present Professor, Department of Atmospheric Sciences, Yonsei University, Seoul, Korea
2009 ~ 2010 Visiting Scholar, UCLA, Los Angeles, CA, U.S.A
2009 ~ 2010 Visiting Independent Advisor, NASA Jet Propulsion Lab, California Institute of Technology, Pasadena, CA, U.S.A.
2012 ~ Present Principal Investigator, Geostationary Environment Monitoring Spectrometer (GEMS)
2016 ~ 2017 Visiting Scholar, Atmospheric Measurement Group, Harvard Smithsonian Center for Astrophysics, Cambridge, MA, U.S.A.
2017 ~ present Member, WMO GURME (GAW Urban Research Meteorology and Environment)
2017 ~ 2024 Commissioner, International Radiation Commission (IRC), IAMAS, IUGG
2020 ~ present Guest Editor, Environmental Research Letters
2019 ~ 2021 Member, Science & Technology Committee, National Council on Climate and Air Quality (NCCA)

2017 NASA Group Achievement Award
2018 Scientist of the Month, National Research Foundation, Ministry of Science and ICT of Korea
2019 Medal of Honor in Science and Technology, The President of the Republic of Korea