I don't disagree with you that there is title inflation and a lot of self promotion going on, but we do need a term to describe an eng. who reports directly to

I don't disagree with you that there is title inflation and a lot of self promotion going on, but we do need a term to describe an eng. who reports directly to the C-suite to do high accountability work with no "above my paygrade" limit (or excuse), and is not part of the main hierarchy in that he has no other eng. to answer to nor had to spend his time managing juniors. We legit need a term for this person, as it's an organizational need.