Nathan Brown is to step down as Saints head coach after next Saturday’s season finale.
The Australian has been at the helm at Langtree Park for two seasons and guided the club to its first Grand Final since 2011 with victory over Catalan Dragons on Thursday night.
Brown cited family reasons for requesting an early release from his contract with Saints.
Club chairman Eamonn McManus also revealed Brown had asked for permission to apply for the vacant West Tigers head coaching role in the NRL earlier this season.
No announcement has been made about Brown’s successor, although his assistant and club legend Keiron Cunningham is believed to be among the early front-runners.
McManus added: “Nathan received our blessing to apply for the Wests Tigers head coaching position and although not successful, the same family reasons for a return home still pertained.
We therefore willingly agreed to grant him an early release regardless.
“Nathan has done a great job in rebuilding the St Helens squad over the last two seasons and we are very strongly positioned indeed for the future.
“The club’s focus is now entirely on winning the Grand Final at Old Trafford next week.
“We are confident and the team is looking forward to this game with absolute determination and focus.
“As it is Nathan’s last game in charge, there is even more to play for and the motivation levels are even higher.”