How to deal with a one upper?

[Shake n Blake]

Ah, the one upper. Closely related to the snitch, the brown noser, and the yes man. These types usually care more about how they appear to the boss than actually being good at what they do. They're literally everywhere, even in the military...so there's really no escaping it.

I've seen some good advice in here. Namely "just be good at what you do". Not only does this keep you in good standing with your boss, it's sure to irritate the snitch/brown noser/one upper. If you have the type of boss you can speak freely with, you can always give him/her a head's up, and maybe they'll check the guy. If you can get a couple coworkers to cosign that the guy is an ass, even better.