So-Yong is currently the Director of the Jungbu Blood Laboratory Center of the Korean Red Cross (KRC). She has been the Director of the Safety Bureau at the KRC Blood Services Headquarters, Director of the Blood Transfusion Research Institute, and Director of the Seoul Nambu Blood Center. As the current Director for Scientific Affairs of the Korean Society of Blood Transfusion (KSBT), she is responsible for organizing the scientific program of the KSBT annual meetings and for promoting educational and research activities among KSBT members.
Since 2006 she has been an active representative of the Asia Pacific Blood Network (APBN) and served as the Vice Chair of the APBN from 2015-2016.