7 Companions are recruitable during Constellation main story quests (you meet them all automatically): Andreja, Barrett, Heller, Lin, Sam Coe, Sarah Morgan, Vasco. There may be over 40 Companions in the game. More Companions can be recruited from the following location in certain bars/diners/pubs. Go to System: Alpha Centauri -- Planet: Jemison -- Landing Site: New Atlantis -- from the landing pad walk straight ahead until you reach the open area with the train station, turn left and enter "The Viewport" bar -- talk to the people inside. Recruits can also be found on other planets in similar bars/pubs, such as: The Hitching Post in Akila City and the Astral Lounge in Neon. After recruiting someone, you will be asked to assign them to a place. Just assign each person to your ship and when it's full assign the next person until the achievement for recruiting 10 pops. You can make Quicksave beforehand and reload it afterward to get the money back.