To get it, Ben has to prove to Zach that he still retains his skills as a sniper, and that he can handle any job thrown at him, despite the still painful damage to his knee. He does, and is immediately pulled into a job with the team, rescuing a kidnap victim.
Ben had one big secret, or did have until Durand drew it out of him. Before his life was drastically changed he had denied, even to himself, that he was gay. Now that he's accepted it, and learned that Zach is as well, can the two men forge a bond beyond that of being teammates and friends? It will take several more jobs before Ben gets his answer.