You'd have to make engineer a protected title for that and enforce membership and chartership with your locally recognised engineering institutions to allow working under the title. They do that in Queensland Australia. It's not enforced in our other states, which is odd given Queensland is Australia's Florida ..
Getting a job as an engineer in the UK was hard work because every ridiculous job and it's dog was claiming to be an engineering role. The guy terminating a wall socket for your internet connection: telecoms engineer apparently. Rough gig for having burnt 5 years at university ..