Sung-Il Cho is a professor of Epidemiology. He is a member of the Korea Center for Disease Control's consultation committee on COVID-19 response. He was director of the Seoul Metropolitan Government's Support Center on Infectious Disease Control from 2017–2018 and serves as a consultant to Seoul for COVID-19 response. He holds a ScD in Epidemiology from Harvard School of Public Health. His main research interests include infectious disease epidemiology and public health surveillance