[1] Williams began his legal career as a lawyer with Walter I. Badger in Boston.

In this role he assisted District Attorney Frederick G. Katzmann in the prosecution of Ferdinando Sacco and Bartolomeo Vanzetti.

[1] In December 1924 Williams was appointed United States Attorney for the District of Massachusetts by President Calvin Coolidge.

[1] Williams resigned as U.S. Attorney in 1926 after he was appointed Associate Justice of the Massachusetts Superior Court.

[1] On September 9, 1911, Williams married Mary Harriet Culp of Brooklyn, Connecticut.