I don't see anyone in that role on the Who's Who thread.
And, I don't see the wiki site referenced/linked from this www.primegrid.com site. (just found a link on the left column).
The reason why I ask is that I am finding it difficult to use PrimeGrid and think I might be able to improve things for myself and possibly others if I made contributions to a wiki. I am not looking for a 'role', at least not initially, just an opportunity to contribute in a useful way.