"What Colour is Your Parachute" (great book btw) also says this (that most jobs aren't advertised). I've also noticed it in my work places. Sometimes there's a

"What Colour is Your Parachute" (great book btw) also says this (that most jobs aren't advertised). I've also noticed it in my work places. Sometimes there's a government mandated ad, but they already know who they'd like to hire.