[vonmoltke]

The profession is regulated, but not all practitioners are licensed professional engineers. A licensed engineer needs to oversee, verify, and sign off on the work. It does not need to actually do the work. I worked for four years as an electrical engineer, but never even took the FE (then the EIT) or had any intention of gaining licensure.

[TheCoelacanth]

And even that oversight is only required in some circumstances, mainly when the project involves potential risks to public safety. Not every project needs to involve a PE.