Dr. Mason is Professor of Medicine (Cardiology) at the University of Utah, Chief Medical Officer at Spaulding Clinical Research, and an independent consultant in cardiac safety. He was a member of the Stanford University Faculty in Cardiology from 1975 to 1983. He became Chief of Cardiology at the University of Utah in 1983. In 1999 he was appointed Chairman of the Department of Medicine at the University of Kentucky. From 2003 to 2007 he served as Medical Director and Director of R&D at Covance Cardiac Safety Services. His clinical, teaching and research emphasis is in cardiac arrhythmias, electrocardiography and electrophysiology.