The Rebels have confirmed they have agreed a deal to sign former Australian Under-20s captain Colby Fainga'a on a one-year contract.
The 22-year-old flanker will make the switch from the Brumbies at the end of the current Super Rugby campaign.
Fainga'a, whose older brothers Anthony and Saia both play for the Reds, has appeared 26 times for the Brumbies.
And Rebels head coach Damien Hill is delighted with the new addition to his squad.
"He is a tremendous openside flanker, who can cover all positions in the backrow, which is a skill not many forwards possess in this competition.
"During the club's conversations with Colby he was always wanting to come to the Rebels for an opportunity to play and ultimately improve his rugby.
"At 22 years of age, he has waited patiently behind some very capable footballers and I am sure that his patience will be rewarded with an opportunity.
"He is an extremely hard worker and a very respected member of the rugby community. We know he will have an impact on not only the Rebels, but the entire Victorian rugby landscape."