Dong-Seok Yim He is currently working as professor and chairperson at the Dept. of Pharmacology of The Catholic University of Korea, College of Medicine and the Dept. of Clinical Pharmacology of Seoul St. Mary’s Hospital in Seoul. After graduating from Seoul National University (SNU), College of Medicine in 1992 (M.D.), he got four years’ training of clinical pharmacology at the graduate school of SNU Ph.D.). His master’s degree thesis on the population PK of phenytoin in Korean patients then was the first publication based upon the mixed effect modeling and simulation in Korea. After serving at Korea FDA for three years to fulfill military duty, he got two years’ international fellowship at the Center for Drug Development Science (CDDS) of Georgetown University (Director: Carl Peck). During the fellowship, he also worked as a visiting scientist at CDER, FDA. A population PK-PD project on glucose-HbA1c model and a simulation to compare the conventional and individual bioequivalence study data were projects led by him at CDER. Back in Korea since 2005, he has been leading his PK-PD team and Phase I clinical trial unit of Clinical Research Cooperating Center (CRCC) of Catholic Univ., one of the regional clinical trial centers designated by Korean government. In 2006, he fouunded the PAGK (population approach group in Korea) with his collegaues to accelerate the education of pharmacometrics in the academia and industry in Korea. As a clinical pharmacologist and pharmacometrician, he has been publishing many research articles on the PK/PD of antibiotics, anticancer and cardiovascular drugs etc. PK-PD guided adaptive phase I trial of an anticancer drug is one of research topics he is now performing in cooperation with his colleague clinician.