Mark Merrill has served as President and Chief Executive Officer of Valley Health System and President of the Winchester Medical Center, Winchester, VA since June 2009. Prior to joining Valley Health, Mark served as president of Texas Health Presbyterian Hospital Dallas TX and formerly Presbyterian Hospital of Dallas. Mark brings a history of corporate leadership and business development expertise, and is a nationally recognized speaker on healthcare policy. Prior to his life in hospital administration, Mark was a teacher and dean of students at Landmark School in Manchester, MA. An avid outdoorsman, he led several cross-country trips with students, hiking and canoeing in some of America’s most cherished countryside. Mark received a Masters of Science in Public Health, Health Administration from the University of North Carolina at Chapel Hill. He and his wife live in Winchester, VA.