Stephen Hoiles has been released from the final year of his contract with the Brumbies as he continues to struggle with an Achilles injury.
The 30-year-old, who has been with the ACT-based side for six years, has played just one game for the Brumbies in the last 18 months since injuring his Achilles midway through 2010.
While the former Australia number eight had been making progress in his recovery, recent tests showed Hoiles would not be ready for the opening rounds of the new Super 15 season.
With that in mind, Hoiles and the club came to a 'rugby-based' decision to part ways.
"Because of my injury this past year has been a difficult one for the club and for me, but we have had a good discussion and I feel very comfortable with the decision we have mutually agreed on," Hoiles said in a statement.
"My rehab is coming along well and it's my intention to return to the playing field in the not too distant future.
"Where exactly that will be is something that will unravel in the months ahead."
Brumbies coach Jake White said he was sad to see Hoiles leaving.
"I have been impressed with the way that Stephen has handled this situation and how he has been able to put the Brumbies first. I commend him for his approach," he said.
"Stephen has been an outstanding member of the Brumbies for a long time and it is sad to see him move on."