[yladiz]

I disagree, being an engineer is similar to being a doctor, meaning you go through training and take an oath before officially becoming one. I wouldn't consider a colleague an engineer if they didn't take the engineering oath.

[snovv_crash]

That's to be a registered engineer. It means you can sign off on human-used structures and machines. Lots of people are engineers, and just get a registered engineer to look it over and sign off before production.