title whore
Noun referring to a person who holds a title, just for the sake of the prestige that comes with the title, without actually fulfilling the responsibilities that also come with the title.
He's a real title whore.
title-whore
An obsessive and/or manipulative person who intends to climb up the organizational ladder by whatever means necessary.
You could either be backed by your peers or title-whore around to get to the managerial role.