Lolesi played for the club in 2007 until injury called time on his playing career and the 31-year old moved onto the coaching staff.
Lolesi said: “I decided quite a while back to move on at the year’s end, and it’s typically supportive of the club that they will allow me to spend more time with the newly born child and wife before my time was due to officially end and I start the next chapter of my career.
“I was welcomed here and treated superbly by the club, staff, players and supporters and it’s true that I have settled in the area that I now call home.
“I wish Paul Anderson and all the lads every possible success going forward and I will be in the stands cheering them on whenever possible.”
Paul Anderson took over from Nathan Brown earlier this season after Brown left the club prematurely.