Sounds convincing at times but at other times sounds …. well let me put it this way. If something is meant to be top secret, there are ways you go about that if serious enough about the top secret status.
In short, if this man was genuinely and casually mentioning top secrets from deep bunkers in the American desert, and the folks that hold the secrets genuinely didn't like that. He'd either have no engineering job beyond fixing broken down cars or he'd be dead.
So reservations.