Peggy Whitson, Ph.D., America’s most experienced astronaut, flew on three NASA long-duration space flights and Axiom Mission 2 (Ax-2), accumulating 675 days in space, more than any other American astronaut or woman astronaut in the world.

Whitson has over 37 years of space and science experience with NASA and is currently serving as director of human spaceflight for Axiom Space. Throughout her career, Whitson has held various positions to include NASA’s chief of the Astronaut Office, two-time commander of the International Space Station (ISS), chair of NASA’s Astronaut Selection Board, chief of NASA’s Operations Branch, and deputy division chief for both NASA’s Medical Sciences and the Astronaut Office.

On Ax-2, Whitson become the first female commander of a private space mission, adding to her accomplishments as the first female commander of the ISS, the only woman to serve as ISS commander twice, and the first woman, non-military chief of NASA’s Astronaut Office. During her three previous space missions to the ISS (Expeditions 5, 16, 50/51/52), she conducted 10 spacewalks, logging over 60 hours. Throughout Whitson’s career, she has contributed to hundreds of experiments in biology, biotechnology, physical science, and Earth science.

Whitson received degrees in biology and chemistry from lowa Wesleyan and a doctoral degree in biochemistry from Rice University. She has been honored with numerous awards, including NASA medals in Leadership, Outstanding Leadership, and Exceptional Service; Forbes 50 over 50 (2023); TIME 100 Most Influential People in the World (2018); and Women in Aviation Lifetime Achievement Award (2017).