On 1 July 1937, the Secretary of the Treasury placed the TGF along with the Guard Force of the Bureau of Engraving and Printing, under the authority of the United States Secret Service where they became the Uniformed Force of the Secret Service.
After 1960, when the USSS moved out of the main treasury building the TGF became responsible for arresting and interviewing check and bond forgers and performing on-site investigations into thefts, threats, violence, and deal with mentally ill persons on Treasury property.
In 1970, the TGF became the Treasury Security Force and in 1976 the Guards became Police officers after a ruling by the United States Civil Service Commission.
In 1983 the TPF became the Treasury Police Force and in 1986 merged with the Uniformed Division of the Secret Service.
The Nightwatch administrator, the Pass and Reception Sergeant, and the training lieutenant reported directly to the Chief.