International audienceAlthough the literature on institutional work has identified power relations between incumbents and challengers of the institutional status quo as a key determinant in institutional processes, we still know very little about how these power structures actually operate. Drawing on a definition of power as fix and reified meanings, we study how one type of power relation, namely hierarchical structure, has policed the institutional sensemaking of an emergent occupational group who was supposed to carry new regulative templates challenging the prevalence of the Corporate logic in French hospitals. Using an inductive methodology combining survey and focus group data, we observe that the hierarchical power structure typical...