Whenever I look at the careers of famous physicists, current and past, they seem to only attend prestigious universities. They graduate with a PhD from some great physics school and immediately start teaching somewhere very well regarded, whether it's Princeton or MIT. I've also read "So You Want to Be a Physicist," where zapperz mentions that the majority of physics jobs are posted in Physics Today. I searched in Physics Today's Jobs just today and found one postdoc opportunity at Princeton. No matter when I search, I can't seem to find any assistant or associate professorships at any highly ranked physics universities. I assume that all of these great physicists do well, are known in their field, etc. My question is, how do these people snag jobs at universities like MIT, Caltech and Princeton if those universities never seem to publicize those jobs?