u/Bucser

Dima has been longer in the show than Dev and he aged less in the same timeframe. I would expect a few gray hairs and a bit more wrinkles on his face, but he has not aged at all between season 5 and 3.

(Remember he was part of the assault on Jamestown before being part of the Mars expedition) So he is at least as old as Gordo would be.

Edit: Apologies in the title Sima = Dima - autocorrect from the phone messed up and can't edit post title.