This has to be the first ever occurence of "hey that looks like that guy in that scene..." where it's actually true. He looks like the exact same person. Good find! I wish we could still give karma points - this deserves one.

Edit 2 minutes later: on imdb, they list him as being in 2 episodes, "The Glass Ballerina" and "Not in Portland." I still think it's the same dude, though. Maybe he was once a stand-in, or an extra and then he later got a part? Or maybe the "Ivan/..." means that he has another part, but we just don't know about it yet. Oooooo...mysterious mysteries.