I don't know if you need any more special requirements other than perhaps seniority, it's not something you can really get experience at. I've seen notices around asking about interest in the position with no special requirements. It doesn't seem to be one of the most popular positions to have, as it basically puts you in between a rock and a hard place with the pilot group looking at you as management, and management looking at you as still a pilot. That's only my very basic understanding from what I have seen.