Former Waratahs back Peter Hewat will steer the Brumbies' backline in 2018.
Hewat, who has been in Japan most recently coaching with Suntory, after a successful playing stint with the Top League powerhouse, will return to Super Rugby for the first time since 2012.
The fullback, who notched 636 points in just 50 outings for NSW, also played 78 matches for London Irish through his career.
The 39-year-old said he felt now was the right time for him to return to Australia.
“I am certainly excited by the opportunity of joining the Brumbies and becoming a part of the Brumbies family,” he said.
“The Brumbies are a globally-renowned team who, historically, have always played an attacking and exciting brand of rugby.
“I have had some very enjoyable times in Japan with Suntory but feel that the time is right for a return to Australia. The chance to be involved with a team like the Brumbies is fantastic."
“I have been keeping a close watch on them this season and am looking forward to teaming up with Dan, Laurie and Peter to help the team achieve its goals and challenge for another Super Rugby title.”
Hewat joins Laurie Fisher and Peter Ryan under new Brumbies coach Dan McKellar.
McKellar said he had watched Hewat's progress at Suntory closely.
“Peter was obviously a very good player at the Waratahs and was known for his goal-kicking and his ability to score a try,” McKellar said.
“He has been at Suntory for eight years, four as a player and four as a coach, and, in my role as a consultant to Suntory, I have witnessed his progression.
“Peter is ready for an opportunity to coach at Super Rugby level. His focus will be heavily on the skills aspect and he will be a huge benefit to our backs in particular.