McKellar is in line for a Steve Larkham-like role which would see him combine Super Rugby duties with the Test environment as a Wallabies assistant coach.

The mooted dual-coaching role is part of Rugby Australia's cost-cutting measures across the code, with the national body set to eliminate some duplicated positions to help ease financial strain.

Rugby Australia and Rennie are expected to speak with McKellar in the coming weeks about joining the Wallabies set-up as early as October.

While Rennie is reluctant to comment on the future of his coaching staff, he backed McKellar as a valuable addition.

"I'm not in a position to talk about the rest of our staff because we're at a stage where there's a lot of redundancies, job losses and so on. Over the coming weeks it'll be clearer," Rennie said.

"But what I will say about Dan is that I'm really impressed. I've conversed with him a lot over this year and coached against him when I was at the Chiefs.

"He's running a really good operation there. I think it's really important we provide avenues for Australian coaches to come through and develop. He's a really good coach and would be a good addition to our group."

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Rennie is serving out his quarantine period in Auckland after finishing his tenure with the Glasgow Warriors and is expected to arrive in Australia next month.

The new Super Rugby AU season will kick off next Friday, with the Brumbies to play the Melbourne Rebels in their opener on July 4.

Rennie has been in close contact with his players of national interest during the shutdown, but Super Rugby's domestic relaunch will give him another opportunity to assess the best candidates for Test selection later this year.

Rennie said a selection panel was yet to be confirmed but is happy for director of rugby Scott Johnson to stay involved with the process.

"The next three months is a great opportunity for players. I've been in close contact with the 30-odd of them and it's been good for me," Rennie said.

"A positive side of no footy since March has been that I've done an enormous amount of work with the other staff and then doing a lot of homework to get clarity of players, the quality of their game and so on. We need to see some shifts.

"There's still opportunities for guys to jump in outside that group, that's what the next three months is about really.

"We're in constant contact with the group, some of those guys are maybe for the future and some are ready to go now. I will know a lot more in three months but it's a crucial time."

The Wallabies are touted to play four Bledisloe Cup Tests against the All Blacks later this year, while Rennie says there's still hope the Rugby Championship could go ahead.

"That's a great introduction for us and for me, it's really exciting. It's a really good gauge for us to know where we need to be, the more times we play the All Blacks the better," Rennie said.

"We haven't had much success against them over the past 15 years or so, so we have to put ourselves under pressure against the best. We need to front from the start."