The Dragons have recruited Wales-qualified Arthur Ellis, the Wasps and England Under-20 hooker following his brother Hugo from London to Newport.
"I wanted to sort things out before the IRB Junior World Championships [in Argentina] so I could focus properly on things here," said 20-year-old Ellis.
"I signed for Newport Gwent Dragons just before I came out, which I'm really excited about."
Danny Wilson has also joined the Dragons, as an assistant coach.
The former Wales national skills coach arrives from London Welsh, having also coached with the Blues, Cardiff RFC, Wales Sevens and at Wales age-group levels.
