According to a recent Mishpacha article he is the top posek for the OU.
That is actually fairly vague, I was more commenting on his assciation
Does he go to the O-U office (or off-site location) every day and a W-2 employee
Does he regulary work for the O-U (Like once a week) on a 1099 , but it is regulary.
Or does the o-U only use his services on a rare as- needed basis when a complex issue comes up
What his exact association is matters here. if he is an employee they would have to fire him, but if he is only consulted rarely when a complex issue comes up, they could just get someone else.
The closer the association the more difficuly it is for the O-U to get rid of him.