Homer Chin-nan Tien OMM FRCSC is a Canadian trauma surgeon and the president and CEO of Ornge, an air ambulance non-profit based on Ontario. He also holds the rank of colonel in the Canadian Forces Health Services, associate professorship at the University of Toronto, and was the former director of Trauma Services at Sunnybrook's Tory Regional Trauma Centre. He is the first to hold the Canadian Forces Major Sir Frederick Banting Term Chair in Military Trauma Research. In April 2021, Tien was appointed to head Ontario's COVID-19 Vaccine Distribution Task Force for Phase 2 of the rollout.