Celtic manager Ange Postecoglou says he felt his previous coaching achievements were dismissed by many European clubs due to being an Australian who had coached in Australia and Asia.

Postecoglou joined the Scottish giants last month after a decorated coaching career in Japan with Yokohama F.Marinos and in Australia with the Socceroos, Brisbane Roar and Melbourne Victory - one he noted hadn't been necessarily recognised by some other clubs.

"It was just that the achievements were kind of swiped away pretty easily because of the fact that we're on the other side of the world," Postecoglou told reporters on Friday.

"It was disheartening - not from the point of view (where) I felt like it lessened me - just disheartening that you thought 'well that would have been a great opportunity for me to go in and create something special again'.

"The fact that people couldn't see past geography to do that ... I got to the point I just didn't want to waste my time anymore and think about those things.

"I was happy to wait for the right opportunity if it came along and if it didn't, I would continue on doing what I'm doing till I was doing till I finished.

"But at the same time, there was never any doubt that people were taking notice and I guess after a while, people do just look at the record - and I think football, like the world (is) becoming a smaller place.

"Hopefully, this does show, if I happen to be successful, clubs all around the world will start opening their mind a little bit about when they're seeking talent - whether that's on or off the football field - they'll look beyond just traditional markets."

Postecoglou has long been flagged as a beacon for Australian coaches but said he'd spent 15 years attempting to dispel the idea he was "extraordinary" because of his background.

"I'm hoping I get to the point where people don't look at me as an Australian coach - hopefully not even in Australia," he said.

"Because that was as frustrating for me as any other place where my achievements - even sometimes in my own country - weren't valued because apparently I hadn't coached in Europe yet.

"So hopefully this breaks a few myths and sort of preconceptions about it."

The 55-year-old is in the early stage of bedding down his style at training, with his first friendly against Sheffield Wednesday next week as Celtic build towards their clash with Awer Mabil's FC Midtjylland in the Champions League second qualifying round

He recently made his first signing - defender Osaze Urhoghide - as he looks to build a squad that suits his style.

Postecoglou expressed his excitement at reigniting his connection with Celtic's Socceroos playmaker Tom Rogic, but wouldn't be drawn on any transfer links to fellow Australians Aaron Mooy and Mat Ryan.

"I've always rated Tommy very highly," he said.

"So looking forward to working with him - he's already done some fantastic things here and hopefully over the next period we can reconnect and hopefully I can bring the best out of him."