Pontypridd have signed promising young prop Martin Jones from Ebbw Vale.
Jones, 23, will replace England tourist Duncan Bell who has already agreed to join Bath next season.
The former Wales Under-21 forward had been linked with Cardiff before they signed Wales prop Ben Evans from Swansea.
"I have always been a fan of Pontypridd and in my heart of hearts I always knew I would join them," said Jones.
"With Duncan Bell leaving there is an opportunity for me to prove myself - it's a very exciting time for me and for Welsh rugby.
"With the talent we have on paper at Pontypridd and Bridgend we should be able to make a big impact next season."
Glyncoch have had a remarkable past couple of seasons, having lost just once in the last two seasons. Their fine form has been capped by claiming the South Central Division 5 crown of the SWALEC League.
With two rounds of the HSBC Sevens World Series remaining, Wales head coach Paul John has sprung a few surprises for this week's penultimate round in Glasgow. And there's still plenty to play for with World Cup spots on the line.