As Starwars said, you do get a decker, but he's kind of annoying and weak. And by taking him on runs, you miss out on the other (IMO better) characters, which are beasts at their respective roles.
I felt the game nudged you a bit too hard into rolling a decker/rigger yourself. Which is a kickass combo, btw.
Well, that sucks, I really wanted to concentrate on rifles, like I do in every game. This is where POE shines, you can just create whatever party member you're missing.