For many years, Munro was superintendent of Woodstock's water works and superintendent and purchasing agent for the Woodstock Electric Light Plant.[1][4]
In 1906, Munro was elected Mayor of Woodstock. He defeated H. D. Stevens 451 to 198.[1] He was reelected in 1907. In 1908, Munro was elected to the Legislative Assembly of New Brunswick. He resigned in 1916 to become Registrar of Wills and Deeds for Carleton County.[2] Munro died in 1939.[5]