Science Advisor to the President War II by President Franklin Delano Roosevelt. Vannevar Bush chaired this office through Roosevelt's death in 1945, and continued under Roosevelt's successor Harry S. Truman until 1951. After the war, President Harry S. Truman replaced the OSRD with the Science Advisory Committee in 1951. The office was moved to the White House on November 21, 1957, by President Dwight D. Eisenhower to provide advice and recommendation in response to the Space Race started by the USSR's launch of the first artificial Earth satellite, Sputnik 1. President Richard M. Nixon eliminated the PSAC in 1973, rather than appointing a replacement for
Secretary-General to the President Secretary-General to the President The Secretary-General to the President is the senior Irish civil servant who fulfils four distinct roles in relation to the office of the President of Ireland. The current incumbent is Art O'Leary who was appointed in June 2014. The Office was established by the "Presidential Establishment Act, 1938". Under this Act, and subsequent legislation, the Secretary General is: The Secretary General's signature is essential for the authentication of the Presidential Seal when affixed to a document executed by the Commission under Seal. Under the "Presidential Elections (Amendment) Act, 1946" the Secretary General to the President is