The mercenary company known as the Crimson Aces has a chequered past. Back during the Galactic Civil War, they made big bank on taking jobs from both the Empire and the Rebel Alliance.
With the Rebel Alliance victorious, the company faced intense scrutiny from the New Republic as to their role in the war. In an attempt to make amends, and possibly avoid the public eye for a while, the Crimson Aces focused the majority of their efforts on the Citadel Program, and can also be found on Citadel Station.