 He was the son of Henry A. V. Post, an engineer and sharpshooter officer during the American Civil War.In 1904 he won the gold medal in the singlestick and team foil competition, silver in individual foil and bronze in individual épée and individual sabre.Eight years later in Stockholm he reached to the quarterfinals in individual foil, individual épée and individual sabre and did not advance from first round in the team épée competition.