The Rebels confirmed that Stirling Mortlock, who retired at the end of last season, will be part of the coaching panel under head coach Damien Hill.
He will also have an active role in the club's commercial team.
Three other former Wallabies and ex-Rebels players - Adam Freier, Sam Cordingley and Al Campbell - have also taken backroom jobs with the franchise.
Freier becomes general manager of communications and media, Cordingley will be involved in the club's recruitment, while Campbell will be part of the Rebels' player mentoring program.
"I am really excited about staying involved at the Rebels next season," said Mortlock.
"It will give me the opportunity to stay connected with the on field team, assisting the coaching staff and players. The role also enables me to be part of the longevity of rugby here in Victoria, helping out in the marketing side of the club."