TL:DR;, Engineer is a title, granted by the state, not something you get for having an Engineering Degree
Except that Oregon has it simple, you have to be a LPE - Licensed Professional Engineer. That is a NATIONAL license. You take 4 years of approved schooling, and then sit the two LPE exams, and you are an LPE. Interestingly MOST of the exam is Civil Engineering (things like slump of concrete)
They are not the only state that registers engineers, and almost all of them it as simple as be an LPE, and register
Were you see this - real example. Want to put a ham radio tower in your yard? SOME municipalities require the drawings for installation to be "wet stamped" - aka the fact that the Mfg of the tower has down all the numbers that the design is good to XXX, and that the footing should be X sized, they require an LPE from that state to review the drawings, and stamp the drawings with his OK (they can not be photocopied) - aka they are "wet stamped"
Thing is, when an LPE signs off on plans, he is taking the legal responsibilities for those plans. Things go wrong, it is HIS/HER (I'll use he, as the vast majority of LPEs are male) ass on the line for lawsuits and possible criminal responsibility, NOT the company he works for!
This by the way is why we are not "software engineers". If we WERE, it would require a certified Engineer to sign off (first we'd have to agree to what a Certified Software Engineer IS), and that Engineer would be taking legal responsibility for any flaws in the software (not the company, although they may provide his insurance as a benefit)
It is a bit like being a "Member of the Bar" - the degree doesn't mean crap till they are admitted to their local Bar - and you can be Disbarred, and you can't call yourself a lawyer or practice law until you are a member of the bar - You'd have a law degree (JD) but not be a lawyer
BTW, where my daughter is going to school, as an example you can take
Mechanical Engineering - which is recognized by some large number of states, and allows for you to sit LPE
Mechanical Engineering Technology. Only a very small number of states allow this one for you to be called an Engineer.