Patrick Mitchell has been appointed chief operating officer at St George's Healthcare trust in south London.
The former director of operations at Royal Brompton and Harefield trust has being working in the post on an interim basis since last October but has now been made permanent.
The post is a new role, working below trust chief executive David Astley.
Mr Astley said: "The trust is gearing up for an exciting future and has some major challenges ahead as it works towards achieving foundation status. I am delighted that we have someone of Patrick's calibre on board as chief operating officer."