 He served as Chief Judge of the Eleventh Circuit from June 1, 2009 until July 31, 2013.In 2009 Dubina served as member of the three-judge panel which denied an "Application for Leave to File a Second or Successive Habeas Corpus Petition" in the Troy Davis case.Dubina was on the 11th Circuit Court of Appeals panel that reviewed Roger Vinson's decision in "Florida v. United States Department of Health and Human Services".