Australia lock Dan Vickerman is to return home after signing a three-year deal with the ARU.
Vickerman is currently studying for a degree in agricultural economics at Cambridge University, having moved to England in 2008.
However he will head home at the end of the course in June 2011 in a hope of forcing his way into the World Cup squad - with the 31-year-old also agreeing to play for the Waratahs in the Super 15 from 2012.
"It was a big decision to leave Australia in 2008 but I wouldn't change a thing," said Vickerman.
"Rugby has given me the opportunity to play and study abroad but next year is the right time to come back.
"I've been in communication with the coaching staff at the Waratahs and the Wallabies for a while now and collectively we're all on the same page in terms of where we want to be at and what we want to accomplish.
"I know there's a lot of hard work to be done over the next 12 months to push for a place in the World Cup squad but that's what I'm focusing on and that's what I want to achieve."
Although rugby has played second fiddle to his studies, Vickerman has played in the past two Varsity games and has made a solitary appearance for Northampton against Sale in the Guinness Premiership.