The title of Piermaster was phased out in the 1980s(?), I think. When I joined the ranks in about 1990, there was definitely no Piermaster. The General Manager was in charge of everything and, at that time, the post was filled by a smart guy called Brendan McLoughlin. He is now the co-owner of the Cruise nightclub in Chester.
It would be interesting to know what happened to all the records/files etc of the Llandudno Pier Company, who owned the Pier from 1878 up until about 1968. I hope they weren't all dumped in a skip somewhere when Entam Leisure took over!