What if he outsourced his work to actual engineers?..
But the point of credentials like these is not only that they're shorthand for a range of requirements (degree granted by appropriately accredited institution, passed licensing exam, insured, practice complies with relevant professional standards, etc.), but also that they're issued by organizations that have mechanisms in place to verify that a particular applicant actually possesses the credential in question, e.g.,
https://www.iardc.org/Lawyer/PrintableDetails/0ae1f2b7-a864-...
A portion of his salary most likely ended up in the party fund.