Then, there are those who's actually left. And then came back after a couple months/years. In my place with 200+ employees, we have a few who's in their 2nd, or even 3rd terms with us. This includes my current boss, who quit a few years back to start his own company, but it didn't work out and he came back. He was #6 when he quit. Now he's #2. Which is as high as he's going to get, cause #1 is the main share holder.