HSHS St. Mary’s Hospital CEO accepts new job in Louisiana Tim Stumm 6 years ago HSHS St. Mary’s Hospital CEO Joan Coffman is resigning her post and taken a new job as CEO of St. Tammany Parish Hospital in Covington, La.To access this content, you must purchase 1 Year Health News Illinois Subscription or 1 Year Group Subscription - Up to 5 Users, or log in if you are a member.