[DaveExeter]

I dunno. I think only a tiny fraction of people with mechanical engineering degrees become Professional Engineers.

It's mostly Civil Engineers who bother to get PEs.

[Eddy_Viscosity2]

The people who need the P.Eng. qualification get it and the ones who don't need it tend not (why do all that extra effort if its not required). So that just means more civil engineering positions require it than mech eng positions.