Liberty Regional Medical Center has hired a new chief executive officer to run the hospital, four months after longtime CEO H. Scott Kroell retired. Liberty County Hospital Authority Chairman James Rogers said Michael Hester from Richmond Hill is the new CEO. “I am thrilled and excited to be joining Liberty Regional Medical Center,” Hester said during a phone interview Tuesday. “And I’m actually very honored by the confidence of the board and the staff of placing me to be the leader and the steward of the hospital.”