Lyon was a member of the Vermont House of Representatives from 1799 until 1802, 1804 until 1806 and 1808. He was a member of the Vermont Executive Council in 1808.
Lyon served in various capacities within the Vermont government from 1799 to 1808. He was a member of the Vermont House of Representatives from 1799 until 1802, 1804 until 1806 and 1808. In 1808, he was part of the Vermont Executive Council.