Jones on Sunday announced that he will hang up his boots 18 years after making his professional debut for Neath.
The veteran front-row forward, who went on two British and Irish Lions tours, will remain at Harlequins as assistant forwards coach on a full-time basis when his playing days come to an end.
"I'll be officially retiring from playing at the end of the season. I've had a great career and never thought I'd go on to achieve what I have." said Jones.
