Looks very serious, and I'm liking that. The armor is for what exactly? Does he fight in desert or multiple terrains? Does he have a certain faction of PMCs that he works for/with? Help me out here, this looks like a comicbook character, and I'd like to know more.
He is a merc, works for PMCs, he fights wherever he needs to, but he prefers the urban terrain, that way he can be fast and loud without loosing the surprise factor, he is experienced in what he does, and does it because he is good at it. The armor is made of advanced polymers lighter than kevlar and flexible, he must be fast and agile so thats why he uses light armor.
Later i'll upload some more concepts of the agent and im working on some other distinctive characters, thanks for the comments.