This paper explores the relationship between migration, religious authority, and professional integration through an ethnographic study of Muslim religious leaders—chaplains and imams—in France and Francophone Europe. The research takes France as the primary field of investigation and the starting point for a comparative perspective with other Francophone European contexts: Belgium, Luxembourg, and Switzerland. Based on long-term participant observation, qualitative interviews, and fieldwork conducted among students and graduates of religious training institutions associated with different Muslim communities, the study investigates how migrant religious actors navigate the institutional spaces of contemporary European societies. Most Muslim religious leaders involved in chaplaincy, mosque leadership, or religious mediation within Muslim institutions originate from migratory backgrounds, particularly from North Africa. Their trajectories often combine labour migration, religious education, and forms of community leadership that emerge within diasporic contexts. This research approaches these trajectories through a socio-anthropological lens, examining how migration shapes both the social profiles and the professional practices of Muslim religious actors. The analysis highlights several structural constraints affecting the professionalisation of Muslim religious leadership in Francophone Europe, including linguistic barriers, institutional expectations, and tensions that arise when forms of religious authority encounter secular institutional frameworks. At the same time, Muslim religious leaders frequently act as intermediaries between migrant communities and state institutions, occupying a hybrid position that connects religious practice, labour migration, and the governance of religious diversity. The study draws on insights from the sociology of actors, the anthropology of Islam, and political sociology.