 The Introduction of regional rugby union teams in Wales took place in time for the 2003–04 season, at which time Moriarty joined the Llanelli Scarlets as forwards coach, becoming part of then-head coach Gareth Jenkins' backroom staff.He remained at the club throughout the following tenures of Phil Davies and Nigel Davies.He became head coach of Principality Welsh Premiership champions Cardiff for the 2009–10 season, and although the Arms Park club qualified for the playoffs despite only finishing seventh, they fell at the first hurdle to Llanelli.