"I did this because I believe succession, planning and stability are very important and have been a key component in Wasps' success. I would like to wish my successor, as well as everyone else at the Club, all the very best for the future.
"I have had four incredible years at Wasps and developed many special and significant friendships with fellow coaches and players and I am proud of the Club's achievements in winning three major trophies during that time. I am currently discussing with the Club the format of my involvement next year, as the Board, quite rightly, has to be happy that a successful transition takes place.
"Wasps and its people will always remain very close to my heart."
In four seasons under Geech's tutelage Wasps collected a range of silverware with Premiership honours and an Anglo Welsh title to add to their Heineken Cup victory over arch rivals Leicester at Twickenham in 2007.
Wasps are still hoping to qualify for next season's Heineken Cup if Bourgoin defeat Northampton Saints ion Fridays's European Challenge Cup decider.