Captain Billard was commissioned through the School of Instruction of the Revenue Cutter Service in 1878. He served in the U.S. Coast Guard during the Spanish-American War, and then again as Commanding Officer of the U.S.S. Aphrodite in World War II, escorting troop and supply vessels across the Atlantic. His ship was the first American vessel to pass through the Kiel Canal after the Armistice. He was appointed superintendent of the Coast Guard Academy in 1921, and in 1924 with the rank of Rear Admiral, he assumed responsibilities as the SIXTH Commandant of the Coast Guard until his death while in office in 1932.