I've heard it called engineer's syndrome. "You start believing that since you're an excellent engineer in one specialty, then you're a friggin' genius in everything you do, because it's all the same, really" [0]
It apparently affects physicists too, and must be common enough to warrant two xkcds. [1][2]
0. https://web.archive.org/web/20071226220909/http://www.pcmag.... 1. https://xkcd.com/1831/ 2. https://xkcd.com/793/