Professor, Brown University, 1766-1824
Private practice, Providence, Rhode Island, 1768-1779, 1781-1782
Justice of the peace, Providence, Rhode Island, 1779
Justice, Rhode Island Court of Common Pleas, Providence County, 1780
Delegate, Continental Congress, 1782-1785
Associate justice, Supreme Court of Rhode Island, 1786-1787
Attorney general, State of Rhode Island, 1789
Boundary commissioner, New York City, 1794