He was a lawyer in private practice. He served as solicitor of the city court from 1914 to 1917. He served as mayor of Statesboro, Georgia from 1924 to 1927. He served in the Georgia National Guard from 1927 to 1931 and was appointed as the state adjutant general.[2]
Parker was elected as a Democrat to the Seventy-second Congress to fill the vacancy caused by the death of United States Representative Charles G. Edwards. He was reelected to the Seventy-third Congress (September 9, 1931 – January 3, 1935). He served as chair of the Committee on Elections No. 1 (Seventy-third Congress). He was an unsuccessful candidate for renomination in 1934. He was appointed comptroller general of Georgia, 1936–1937.
Parker was elected comptroller general of Georgia from 1940 to 1946. He died on June 22, 1946, in Atlanta, Georgia. He was interred in East Side Cemetery, Statesboro, Georgia.
^"Emergency Officers List and Directory", United States War Department, The Adjutant General's Office, Washington, D.C., United States Government Printing Office, December 23, 1919, page 47.