Division One club Cross Keys have lost centre Rhodri Davies to London Scottish only to gain several other players.
The biggest signing for the Keys is Simon King as forwards coach to replace the former Wales flanker Richie Collins.
King will work under head coach David Rees and be joined by Phil Ramsey as team manager.
Ramsey is the fitness coach for the Wales FIRA (under-19) squad, where Rees is the coach.
Former scrum half Tommy Walsh returns from English club Rugby RFC and another scrum half Steve Harris has joined from Calgary in Canada.
Other signings include the big Tongan utility back Movete Ota'ota, formerly of Treorchy. He is joined by last season's Abertillery skipper Darren Miles, Rhymney wing Romilly Barnett and Abertillery flanker Martyn Williams.
Ebbw Vale captain Damien Hudd picked up the biggest accolade of the night at the 11th Principality Premiership Awards Evening held at Principality Stadium, after leading his side to the title for the first time.
Wales assistant coach Robin McBryde is predicting a tough battle against England on Sunday despite the fact they may not be considered to be at full strength. Players will be out to impress Eddie Jones which makes England a dangerous proposition, he says.
Wales U20 captain Tom Phillips and performance psychologist Dr Rich Neil explain why spending three days at Monmouth RFC has further strengthened the togetherness of the squad ahead of the #WorldRugbyU20s
Alongside Scarlets flanker James Davies and Cardiff Blues centre Cory Allen, three Wales Sevens core players have made the extended training squad for GB Sevens. Wales Head coach Gareth Williams tells WRU TV's Graeme Gillespie why Luke Treharne, Sam Cross and Luke Morgan earned selection in the initial training squad for Rio.
Wales Sevens head coach Gareth Williams tells WRU TV's Graeme Gillespie he has had to overcome a number of injuries before naming a competitive squad for this weekend's penultimate round of the World Series in Paris.
Merthyr were officially crowned champions of the SSE SWALEC Championship at Dowlais on Saturday where captain Andy Powell paid tribute to his side who have earned promotion to the Principality Premiership