Shannon is a veteran astronaut with one long duration mission lasting 163 days to her name. She holds a Master’s Degree in physics with a speciality in the solar wind’s interaction with Venus’ atmosphere.
She served as a robotics flight controller during the Space Shuttle era and was chosen in 2004 as an astronaut. She was the only NASA member of that class to never fly a Shuttle mission. She will be the first woman to fly on a U.S. spacecraft since Sandy Magnus on Shuttle Atlantis (STS-135) in July 2011.