The club confirmed the appointment on Tuesday, announcing that Rosenior will officially begin work on Thursday, July 9, when the squad returns for pre-season training ahead of the new campaign.
In a statement, Paris FC said:
"The English manager has signed a contract with the club until June 2028 and will take up his post on Thursday 9 July, when team training resumes."
Rosenior succeeds Antoine Kombouaré, whose spell at the club comes to an end after helping stabilize the team during the second half of last season.
Kombouaré was appointed in February and successfully guided Paris FC away from the relegation zone, leading the side to an 11th-place finish in Ligue 1. His tenure included impressive victories over AS Monaco and reigning French champions Paris Saint-Germain.
Explaining the coaching change, the club stated:
"Following this season and after discussions between all parties involved, it was decided to bring this collaboration to an end in order to open a new chapter in the club's history."
The appointment marks another significant move in Rosenior's coaching career and sees him return to French football. At 41, he has built a growing reputation as one of England's brightest young managers, earning praise for his attacking style of play and his ability to develop young talent.
Paris FC highlighted those qualities in its announcement, saying:
"Aged 41, Liam Rosenior already has a wealth of experience at the highest level. He has quickly established himself as one of the most promising coaches of his generation."
Club official Antoine Arnault, representing the Arnault family that owns Paris FC through the LVMH luxury group, welcomed Rosenior and expressed confidence in his ability to lead the team's next phase of development.
"My family and I are delighted to welcome Liam to our club and to see him return to our league here in France. I have always been impressed by his philosophy of play and by what he has built with his teams, which often consist of young players," Arnault said.
Rosenior's arrival signals Paris FC's ambition to establish themselves as a competitive force in Ligue 1, with the club hoping his progressive football philosophy and track record of nurturing emerging players will help shape a successful new chapter.