Grech is fast emerging as a skipper to watch and will be up to his neck challenging for titles next season.
Bury, meanwhile, signs off with two Australian titles, two state crowns and two club championship wins.
He said: "The timing is right to retire but I will still be strongly involved in the class and club and hopefully helping out the younger guys and girls in a mentor role.
"And you never know, you might see me back out there from time to time."
"It was a great way to finish what has been a really successful time."
It's also the end for decorated Sutech crewman Steve Bowen.