He represented Pictou County in the Nova Scotia House of Assembly as a Conservative member from 1925 to 1933.
[1] He was educated in New Glasgow and at Dalhousie University, on the Board of Governors of which he was later to serve.
He worked in his father's grocery business and then as a bookkeeper before returning to Dalhousie to study law.
Doull was admitted to the Nova Scotia bar in 1910 and went on to practice in Glace Bay and New Glasgow.
He served in the province's Executive Council as minister without portfolio from 1928 to 1931 and Attorney General from 1931 to 1933.