The White House Military Office (WHMO) is a department within the White House Office that provides military support for White House functions, including food service, presidential transportation, medical support, emergency medical services and hospitality services. The White House Military Office is headed by the White House Military Office Director.

The White House Communications Agency (WHCA), originally known as the White House Signal Corps (WHSC) and then the White House Signal Detachment (WHSD), was officially formed by the United States Department of War on March 25, 1942 under President Franklin D. Roosevelt. The organization was created to provide secure normal, secret, and emergency communications requirements in support of the president. The organization provided mobile radio, Teletype, telegraph, telephone and cryptographic aides in the White House and at "Shangri-La". The organizational mission was to provide a premier communication system that would enable the president to lead the nation effectively.