The Executive Office of the President (EOP) consists of the immediate staff of the President of the United States, as well as multiple levels of support staff reporting to the President. The EOP is headed by the White House Chief of Staff, currently Doug Stamper. The previous mentioned Chiefs of Staff are: Linda Vasquez (S1) Christina Gallagher (S1) and Remy Danton (S3). The size of the White House staff has increased dramatically since 1939, and has grown to include an array of policy experts in various fields.