In France, when you graduate from uni with an engineering degree, for the first 2 or 3 years after, you have to call yourself a Technician and only with relevent experience can you then become an engineer.
Although it pains me to suggest that the French have had a good idea, this one is good. I work in the rail industry, and you get a lot of graduate "engineers" who haven't got a clue about rail vehicle engineering. Sure, they can do a Finite Element Analysis on a crane hook, or know how to build a device to stop an egg breaking after a 10m fall, but when it comes to industry specifics . . . no chance. It probably takes 3 or 4 years of learning to understand the systems and terminology (or maybe that was just me!). I'm sure this is the same for most engineering industries and disciplines.
My old man is a qualified Heating Engineer though, in his case, he had to be properly qualified and learn the theorectical and science side of the discipline. He designs complex heating systems so should count as an Engineer. The blokes that actually put in the pipes etc. used to be called Pipe fitters (not even plumbers) but are now all . . . . you guessed it "Engineers"!