Yes, but with the symbiotic nature of the nanosuit, correct me if I'm wrong please, you don't age hardly at all because the suit essentially keeps you tip top for the life of the suit. At least, I have assumed as much. Clarification from a more knowledgable fan on the nanosuit would be appreciated.
I wasn't aware about the age thing, however for me it doesn't matter whether he aged or not. As long as he is making an appearance, you never know how the table could turn in the game. You could find yourself playing as him from some point in the game till the end of it. He still has the first Nanosuit though, i think...