Graham Arnold can take enormous credit for the Central Coast Mariners thread running through the Socceroos squad preparing to face France and Canada, according to Belgium-based Mat Ryan.

Goalkeeper Ryan will be joined in Socceroos camp this week by former Mariners teammates in Oliver Bozanic (FC Luzern, Switzerland) and Tom Rogic (Celtic, Scotland) ahead of the clash with Les Blues in Paris on Friday and the Canadians in London four days later.

And with current Mariners striker Mitchell Duke also a recent national team inclusion, Ryan says it speaks volumes for coach Arnold's Central Coast set up and his ability to develop talent for the international stage.

"Arnie has a lot of experience, obviously being under Guus (Hiddink) at the (2006) World Cup back in Germany and he's coached the Socceroos himself," said 21-year-old Ryan who has continued to flourish since joining Brugge this season.

"The Central Coast, they've been a club that's been known to give young guys a go and the biggest thing about developing your game is being given an opportunity to play.

"Arnie has no hesitation to throw a young boy in there, which gives them great confidence and he's very good at man-managing people within the team as well to get the best out of them.

"After I made a mistake, he was always the first one to come to me and pick me up and to coach me and let me know what is the most important thing, which is to bounce back strongly."

Ryan is expected to share game time with Borussia Dortmund's Mitch Langerak as they get the chance to show their wares in goal for the Socceroos after veteran Mark Schwarzer was omitted for the two friendly matches in Europe.

Despite headlining a list of departures from Bluetongue Stadium that also includes Bozanic, Bernie Ibini and Patrick Zwaanswijk, Ryan believes Arnold will have the Mariners well prepared for their A-League title defence, which kicks off with a grand final rematch with Western Sydney in Gosford on Saturday.

"One thing I've learned is to never write Arnie off," said Ryan.

"This year he's probably lost a bit more personnel than in recent years.

"But Arnie, with the man management skills that he has and the knowledge he has in football, I know he's going to create a defensive structure that's difficult to break down again."