Admiral Arthur Gerard McDonald, CMM, MSM, CD (born 1967) is a Royal Canadian Navy admiral who served as Chief of the Defence Staff of the Canadian Forces from January 14, 2021 until February 24, 2021 when he voluntarily stepped aside pending an investigation by the Canadian Forces National Investigation Service. In this position, while he retains his rank and commission, he remains off-duty. McDonald previously served as Commander of the Royal Canadian Navy and Chief of the Naval Staff. He is Canada's first full admiral since Admiral John Anderson held the rank in 1993.