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The Administrator of the National Aeronautics and Space Administration is the highest ranked official in the United States space agency, NASA. The Administrator is NASA's chief decision maker, responsible for providing clarity to the agency's vision and serving as a source of internal leadership within NASA. The office holder also has an important place within United States space policy.The Administrator is appointed by the President of the United States and serves at his/her pleasure, with Senate advice and consent. Former senator and astronaut Bill Nelson has served as the administrator since May 3, 2021.