 While at the University of California, San Diego, he was the Vice Chair for Research of the Department of Medicine (2007-2010) and Associate Director for Research Training in the Division of Pulmonary and Critical Care Medicine (2003-2010).In July, 2010, Yuan moved to the University of Illinois at Chicago to assume a position of Program Director in the newly established Institute for Personalized Respiratory Medicine (2010-2014).He was also Vice Chair for Scholarly Activities of the Department of Medicine at the College of Medicine and Director of the Program in Pulmonary Vascular Disease and Right Heart Dysfunction at the Center for Cardiovascular Research in the University of Illinois at Chicago.