Like it or not, its not the 80's anymore and the NRL is a genuine professional sport these days, my personal view is to be on the list of potential CEO's, you should have a education qualification in business, and another specifically in sports admin or science, you should also have minimum 2 other admin/management roles on your resume but more would be better.
If that person had history with the club it would be a small bonus, but only in that it would give fans a warm and fuzzy feeling, outside that it would be totally irrelevant to your ability to do the job.