Gist, the 4 are:-

  Reid Wiseman (47): A US Navy pilot who served for a time as the head
  of Nasa's astronaut office. He's flown one previous space mission, to
  the International Space station in 2015.

  Victor Glover (46): A US Navy test pilot. He joined Nasa in 2013 and
  made his first spaceflight in 2020. He was the first African American
  to stay on the space station for an extended period of six months.
  
  Christina Koch (44): An electrical engineer. She holds the record for
  longest continuous time in space by a woman, of 328 days. With Nasa
  astronaut Jessica Meir she participated in the first all-female
  spacewalk in October 2019.
  
  Jeremy Hanson (47): Before joining the Canadian Space Agency, he was a
  fighter pilot with the Royal Canadian Air Force. He has yet to fly in
  space.

By inventing ssh, software engineers have shot themselves in the foot. Wont be seeing them on such missions anytime soon.

But what happens if there is a bug, the network connection to earth has died and the zoom calls have gone offline. Will we need a software engineer on board then?