Secours Health System and the Bon Secours St. Francis Health System have appointed Mark Nantz as its new CEO for Bon Secours St. Francis Health System in Greenville, SC. Nantz will assume his new responsibilities at St. Francis Feb. 1. Nantz comes to St. Francis from Carolinas HealthCare System, where he is currently president of Carolinas Medical Center-NorthEast in Concord, NC.