Member of the United States House of Representatives from Massachusetts, 5th Congress, 1797-1799. United States marshal for Maine District (appointed by President John Adams), 1799-1803. Judge Massachusetts Supreme Court, 1806-1814, chief justice, 1814-1830.
1st Royal professor of law at Harvard, 1815-1827, submitted plan for law school at Harvard, 1817 (plan adopted and school established). Overseer Harvard, 20 years. Trustee Bowdoin College, 11 years.
President Massachusetts Constitutional Convention, 1820. Consolidated reforms in Massachusetts judicial system. Author: Oration on Washington, 1800.
Sketch of the Character of Chief Justice Parsons, 1813.