Australia international Cooper Vuna will make the move to Worcester Warriors with immediate effect from Japanese side Toshiba Brave Lupus.
The quick and powerful wing, who made a name for himself at the Rebels in Melbourne, has been capped by the Wallabies on two occasions in 2012.
"I've recently been following Worcester Warriors and their progress to make it back to the Premiership," revealed Vuna, who is an impressive finisher.
"Seeing the team's dynamic and style makes me excited to get over there and amongst it.
"I can't wait to get out on the field and help the team push through and back to where they belong.
"I know that under the guidance of Dean Ryan and the other coaches I'll be able to further improve my knowledge of rugby as well as my game."
In other news from the Championship, the Warriors' promotion rivals Bristol have signed Sale scrum-half Will Cliff, who will join them at the end of the season.
"Our recruitment for the new season continues with the arrival of Will – an experienced Premiership performer," director of rugby Andy Robinson told bristolrugby.co.uk.
"Will's reaching the prime of his career and we are confident he will continue to develop his game at Bristol."