Private practice, Augusta, Maine, 1815-1817
Private practice, Hallowell, Maine, 1817-1821, 1822-1824
State representative, Maine, 1821-1822
U.S. representative from Maine, 1825-1829
U.S. senator from Maine, 1829-1835
Private practice, Boston, Massachusetts, 1836-1841, 1865-1880