Martin was state tax commissioner in 1888, 1890 to 1892, and 1894. He served as United States Attorney for the District of Vermont beginning in 1898, succeeding John H. Senter.[4] He served until 1906, and was succeeded by Alexander Dunnett.[5]
Martin was a longtime member of Brattleboro's school board, and served on the board of directors of several corporations, including Vermont Mutual Fire Insurance, American Fidelity Company, National Life Insurance Company, and the Holden & Martin lumber company.[3]
Martin remained on the court until his death.[2] He died at the train station in Montpelier, Vermont after suffering a heart attack on January 14, 1915, aged 68.[2] He was buried at Morningside Cemetery in Brattleboro.[7]
In 1869, Martin married Delia E. Howard, who died in 1881.[3] They were the parents of three children—Jimmie (1873-1880), an unnamed son who was born and died in 1877, and Delia (1881-1882).[3] In 1884, he married Jessie Lillie Dewey.[3] They were the parents of three daughters—Margaret, Helen, and Katharine.[3]