The 34-year-old has been the assistant to previous coach Richard Agar, playing a key role in the Wildcats’ surprising march to the play-offs in 2012.
He has also been assistant coach at Hull FC. As a player, he was captain of Hull KR when the players won the Northern Rail Cup and were promoted to Super League. He has also played for Widnes, Parramatta Eels and Hull FC.
“I would like to thank Michael and the board for giving me the opportunity to coach Wakefield Trinity, a club steeped in tradition,” he said.
“Everyone at the club knew this would be a difficult year with some hurdles to overcome but we’ve set some goals and if we are successful in reaching them then I believe the club will be in a much stronger position going forward.
“Rich has to be credited for rebuilding this team through some adverse times. I would personally like to thank him for the time he has invested in me and wish him all the best.”
Webster’s first game in charge comes on June 13, when his team welcome London Broncos to the Rpaid Solicitors Stadium.