All those MIT and Caltech jokes over the years - the third guy on the guillotine who looks up at it and says "Hey, I see why that thing doesn't work," for example, illustrate the S&T culture. This group often has the enormous social confidence of themselves writing most of the humor making fun of them. Which is good, because they usually don't get the jokes that other tribes tell.
Scott Adams and the Dilbert cartoons are the best recent capture of this tribe. Adams, in fact described them in tribal ways several times. "Engineers In The Mist," or Dilbert's testing the prospective hire by asking him engineer stereotype questions "You have a shirt pocket stuffed with pens. How many of them will you need to complete a project?" (All of them). Gadget competition with Techno-Bill.
Adams works in the conflict and cooperation with the Business Tribe as well. I don't think they make fun of themselves much. Rednecks, one of the many offshoots of the God & Country tribe, have been able to laugh at themselves. The older tribal divisions of regions and ethnic groups are in full swing now, suggesting that identification with them may be less personal. Folks have more distance from those. The newer divisions may cut to the bone more. I don't notice that the Government & Union Tribe has many members poking fun at themselves. They don't see anything humorous about membership.
Who does make fun of themselves? It's usually a marker of emotional balance.