Career
He was one of the founding settlers of Ridgefield, Connecticut. He was the son of Thomas Seamer, the Norwalk settler and Hannah Marvin. He served as a selectman of Norwalk.
On September 30, 1708, he, along with John Belding, Matthias Saint John, and Samuel Keeler entered into an agreement with the native leader Catoonah to purchase the land today known as Ridgefield.
At a Norwalk town meeting in 1718, Matthew, is picked as part of a 6-man committee to represent the town in a major political dispute. He was named as a lieutenant in 1710, and was named a captain of the North Company of Norwalk on May 26, 1729.