Bosz had been out of work ever since he was sacked by Bayer Leverkusen back in March but the 57-year-old Dutchman has arrived at the Groupama Stadium as a replacement for Rudi Garcia, who led Lyon to fourth position in the league last season.
Bosz has also coached Borussia Dortmund and Ajax Amsterdam in the past, leading the Dutch giants to the Europa League final in 2017 where they lost to Manchester United.
"I am very happy to be here, in a great club," Bosz said at a news conference on Sunday.
"I have a philosophy: to produce attacking and attractive football, because we play for the supporters, not for ourselves. But obviously, it depends on the players in the squad. I prefer technical and intelligent players."
"At Ajax, like at Lyon now, it was important to play the youngsters," he added. "But it does not just depend on the age: I am not scared to give young players a chance and to put faith in them. They have the qualities. At Leverkusen for example, I gave Florian Wirtz a chance when he was just 16.
"In the Netherlands, it was said that the team started seasons slowly and finished strongly. In Germany, I was told that the team started strongly and finished slowly. What I want, in France, is to start and finish strongly.
"I am heading back for two more weeks of holiday, but I will of course remain in contact with Juninho to talk about the players, pre-season, the way of working. I will be thinking a lot about Lyon."
