SSM Healths taps Harbison to head St. Mary’s Jun 11, 2018 | HNI Stories, Hospitals, Top Stories SSM Health named Damon Harbison president of St. Mary’s Hospital in Centralia.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.