[Alan A]

Is he a licensed PE? Or the equivalent of whatever that is in the state in question? If not, no, IMO.

I have an engineering degree. And sufficient experience that if I were to take and pass the exams I'd be qualified as same.

But I don't call myself an engineer - that would be false advertising imo.

Had this exact discussion with an in-law who decided that a bachelors in civil engineering made him a civil engineer and we should accept his design for [something].
It was shut down quick when I asked if he could legally sign off on blueprints...
edit: It was compounded when he told another one of them - who's an architect and can actually sign off on stuff - that he wasn't qualified to comment. I LOL'd and mentioned Dunning-Kruger...