How many years does a postdoc have to spent active in researches before he can attain a full position as a professor and has his own laboratory? Not too long ago I found a PhD thesis of my current group leader, it was written in 2000 or so and now (after 14 years) he has become a prof and has established his own research group. I'm not sure when he got his professorship but I guest it's around 2008, around 8 years after his PhD. Is that typical? I have a feeling that being active in researches for many years is not the only condition to be eligible for a professorship, can somebody tell me in general what requirements does it take?