Sarah Levin Gillis is an American engineer employed by SpaceX as the senior space operations engineer. She flew to space in September 2024 on Polaris Dawn, a private human spaceflight mission, operated by SpaceX on behalf of Jared Isaacman. During the mission, she completed the first commercial spacewalk with Isaacman, becoming the youngest person to date to participate in a spacewalk, and, along with Anna Menon, set a new record for women traveling farthest from Earth.