The Tigers are expected to make an announcement on a new coach this week, with Mick Potter and Kevvie Walters the favourites to take over from Sheens when the club returns for pre-season training on November 5.
At 32, Tuqiri is still not signed for next year but the dual international has no plans to call it quits, even if it means changing clubs.
While it remains unknown whether Tuqiri will factor into the new coach's plans, his manager said there was one guarantee.
"One thing is 100 per cent: regardless of where he may be he will definitely be playing next year," Giancarlo Lombardo said. "That is not in doubt."