Australian rugby has received some mixed news with Scott Fardy announcing he will move to Ireland at the end of this season while his Wallabies and Brumbies teammate Sam Carter has re-signed for two years.

Carter's contract extension with the ARU until the end of 2019 is a big boost, with the 27-year-old lock highly regarded for his toughness and athleticism and is well poised to add to his 13 Test caps.

"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," Carter said in a statement.

"The Brumbies are very special to me and have been a major part of my rugby career and it's great to be able to be settled and in an environment I know very well.

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"There are lots of positive vibes around the club and I am looking forward to playing my part."

Fardy's signing with European powerhouse Leinster comes after the 30-Test back- rower fell out of favour with Wallabies coach Michael Cheika last season.

The 32-year-old's decision to leave the Brumbies comes after experienced players Stephen Moore, Joe Tomane and Matt Toomua all departed the club at the end of last season and while David Pocock is unavailable on a one-year sabbatical.

Fardy has collected more than 80 Super Rugby caps for the Brumbies since his debut in 2012.

"Scott has been a fantastic player for the Brumbies during his spell with the club," Brumbies chief executive Michael Thomson said.

"Whilst we are obviously disappointed that Scott has decided to move on, we thank him for his service for the club and wish him all the best for the future."

While Fardy's loss is a further blow to the Brumbies, coach Stephen Larkham, who is also leaving the club at the end of the season, says Carter's contract extension is a good sign for the future.

"Sam's re-signing sends out a positive message throughout the club," Larkham said.

"He is a well-respected individual within the playing group and leads from the front."