Relatively few engineers in the US are licensed. It's fairly common with civil engineering because at least moderately senior engineers are signing off on drawings for regulators. But mechanical/chemical/etc. engineers are not in general licensed overall--maybe 10-20% are the numbers I've seen.
And that's not even counting all the jobs like sales engineer, mud engineer (oil business), etc. that are really more engineering-adjacent jobs (if that).
When I took the engineer in training exam--never had a reason to follow through on a PE, it basically required things like a four-year engineering degree, working under someone for some number of years, passing the PE exam, and presumably signing code of ethics, etc. For certain jobs, it is pretty much a requirement past some level but mostly doesn't matter a lot.
And that's not even counting all the jobs like sales engineer, mud engineer (oil business), etc. that are really more engineering-adjacent jobs (if that).
When I took the engineer in training exam--never had a reason to follow through on a PE, it basically required things like a four-year engineering degree, working under someone for some number of years, passing the PE exam, and presumably signing code of ethics, etc. For certain jobs, it is pretty much a requirement past some level but mostly doesn't matter a lot.