Here's my lame attempt at recreating a caricature Mike Giaimo did of Mark back in the day(Mike was our 1st year character design teacher); the original was better than this, of course(as a matter of fact, I think it was done with no lines at all, just flat marker color-shapes), but all these years later I still can't get that "banana with a hair flip" image out of my brain. Keep in mind that Mark was about 17 then; he's probably wearing his hair differently these days.
Jim is at that boutique studio up north, Pixar, and Mark is across the concrete divide at Disney FA, where he's been for a while heading story. I guess they now both work for the same boss(I still have to pinch myself about that one).
Anyway, they're both very nice guys in addition to cool artists. Also funny. So bienvenue fellas!