Dr. Hijazi came to the United States to begin postgraduate training in the Department of Epidemiology and Public Health at Yale University, where he was subsequently awarded a Masters of Public Health.  He remained at Yale University where he completed a residency in Pediatrics and a fellowship in Pediatric Cardiology.  Upon completion of his fellowship training, he joined the faculty at Tufts University School of Medicine as an Assistant Professor.  In 1997 he was promoted to Associate Professor of Pediatrics and Medicine, and in 1999 Dr. Hijazi accepted faculty appointment at the University of Chicago as Endowed Professor of Pediatrics and Medicine and Chief of the division of cardiology. He has been successful in building a preeminent Pediatric Cardiology Program, which is nationally and internationally recognized for its outstanding clinical service and innovative technologies.  In 2007 Dr. Hijazi became the Director of the Rush Center for Congenital and Structural Heart Disease at Rush University Medical Center and in 2010, he became the James A. Hunter, MD, University Chair. In January 2014, Dr. Hijazi became the inaugural chairman of Pediatrics for Sidra Medical & Research Center and Professor of Pediatrics & Medicine at Weill Cornell Medical College, Doha-Qatar. In May 2014, Dr. Hijazi became the Acting Chief Medical Officer of Sidra Medical & Research Center, a role he completed in December 2015.