space mission undertaken by sunita williams Sunita Lyn Williams (born September 19, 1965) is an American astronaut and United States Navy officer who formerly held the records for total spacewalks by a woman (seven) and most spacewalk time for a woman (50 hours, 40 minutes). Williams was assigned to the International Space Station as a member of Expedition 14 and Expedition 15. In 2012, she served as a flight engineer on Expedition 32 and then commander of Expedition 33.