This one can be done fairly easily and you can do it at the same time as 2 other achievements.
It's easiest to do this once you do the final jump back to the home station, that way there are no enemies to distract.
Manually move all but 2 crew members to the airlock. Set one of your remaining people tractor beam station and one to the security station. On the security station, select to purge room 1. After the countdown, your people will be sucked into space earning you the below achievement.
As soon as someone is out of the airlock, hold
to highlight a crew member in space. Once that is done select the person at the tractor beam. Once the ship is aligned, select to retrieve and they will be pulled back into the ship earning this achievement. The crew member may die once he's on board, but that doesn't prevent you from getting this achievement.
When you return to the station, you will also get the below achievement.