[slavik81]

A P.Eng. is professionally obligated to refuse work that they're not competent to perform. You can't hire the wrong kind of engineer, because the engineer knows if they're the right kind or not.

[ultrarunner]

Then the wrong engineer just also shirks professional obligation.

[slavik81]

Which would result in their license to practice being revoked by the professional association.

It takes ~8 years to fulfill the requirements to acquire a professional license. It's not worth the risk of being caught.

[slavik81]

Just to expand, I've never heard of an engineer from the wrong field signing off on a document (e.g. an EE signing off on a structure), but here's a lesser example of unskilled practice and the corresponding disciplinary action: https://www.apega.ca/assets/PDFs/discipline-decisions/18-011...