Trevor Jackson has been a fighter ever since he was a kid. He started off his career as a bodyguard but due to his temper and ability to smash people's heads in he was fired.
After that he became a bouncer and nearly made headlines after assaulting five drunk men trying to start a fight with him.
Realizing he wasn't for any of the jobs in the civilian sector Trevor willingly signed up as a warden for MSDF-1 on Titan.
The inmates learned to stay in line or receive a beating from Jackson. When the chief warden, Emile Gerrera, was hired for the Devil Squad program he asked Jackson and his colleague Gonzales to join him.