[1] He graduated from the University of Vermont in 1831 and became a farmer and businessman in Vergennes.
[2] In addition to maintaining an interest in the Vermont Agricultural Society, Seymour served as President of the National Bank of Vergennes.
[3][4][5] Originally a Whig, Seymour held local offices including Justice of the Peace, and he served in the Vermont House of Representatives from 1847 to 1848.
[6][7][8] In 1850 Seymour received a Master of Arts degree from the University of Vermont.
He was a delegate to the 1870 state constitutional convention, and in 1876 was elected to another term in the Vermont Senate.