Re: The Sims 3: Problem with a random career outfits
@cavilesn This kind of thing suggests that the sim's outfit assignment is broken. This isn't uncommon for career outfits. The outfit could have some bad cc, but usually the outfit itself is fine and it's only the assignment that's broken. When this happens, you'll need to manually create, or recreate, the outfit you want for the sim, because the game will just replace it with something else, as you've seen.
If you want the "right" clothing for a sim's career and level, you can check Carl's Sims 3 Guide—the site has screenshots of many of the uniforms on the various pages for the corresponding careers.