Scott Fardy will turn his back on Australia at the end of the Super Rugby season after Brumbies confirmed he will leave the club, with Leinster his reported destination.
Fardy was a Wallabies regular under Michael Cheika during their 2015 Rugby World Cup campaign but has struggled to establish himself in more recent times.
And should a move to Ireland go ahead it would end any hope the 39-cap forward has of an international return given Australia's 60-cap rule for overseas-based players.
"Scott has been a fantastic player for the Brumbies during his spell with the club," said chief executive Michael Thomson.
"Whilst we are obviously disappointed that Scott has decided to move on, we thank him for his service to the club and wish him all the best for the future."
There was better news for Brumbies, though, as co-captain Sam Carter committed to the club until the end of the 2019 season.
The lock has been in and out of the Australia side despite consistent performances for his club - Cheika not selecting him since the series with England in June.
He hopes to force his way back in, though, after extending his stay with Brumbies.
"I am delighted to commit to the Brumbies," Carter said. "I am looking forward to helping the club prosper this season and in the years to come.
"We have an exciting team here at the Brumbies with an excellent blend of experienced heads alongside some top-quality youngsters and I am excited to be part of the continuing success of the club.
"Playing for the Wallabies was also a major motivator to re-sign and I'm excited at the prospect of pulling on the gold jersey again and pushing hard to earn a spot at the World Cup in 2019."