Private practice, Newfield, Maine, 1827-1830, 1843-1846
State representative, Maine, 1830-1834; speaker, 1832-1834
Attorney general, State of Maine, 1834-1838
U.S. representative from Maine, 1839-1843
Attorney General of the United States, 1846-1848
Minister to Mexico, U.S. Department of State, 1848-1849
Private practice, Portland, Maine, 1849-1857
Allotment as Circuit Justice:
First Circuit, February 15, 1858-May 1, 1881