Letson was born in Columbus, but shortly after his birth the family moved back to the Warren, Ohio area.
At the same time, Letson served a machinist apprenticeship, becoming a Journeyman while working at Copperweld Steel Corp. After being sworn into the legal profession by his former employer, Judge Robert A. Nader, Tom joined the law firm founded by his father and uncle, Letson, Griffith, Woodall & Lavelle.
Nader held that legislative seat until 1983 when he returned to Warren to become a Common Pleas judge.
Letson said that "Tom Montgomery is one of the nicest people to enter politics in Trumbull County.
[3] Currently he is serving on the committees of Insurance and its Subcommittee on Workers' Compensation, Judiciary and Ethics, State Government and Elections and its Subcommittee on Redistricting (as ranking member), and Ways and Means (as ranking member).