Nah honestly I know this is a new idea and is still forming as I'm typing but I now see what you are thinking.
It is NOT as a hand's on engineer simply contracted to an individual machine. It is purely working as an "Off tools" job in an advisory/consultancy role with the maintenance being left to the suitably approved and more than competent companies . The idea is to it for multiple aircraft and do all their liason work therefore filling the Owner-Maintenance liason role which I personally feel is missing.