Supervisory bodies can intervene in organizational practices that may harm society, but their effectiveness to do so depends on their ability to make decisions reflectively and decisively. Are these tendencies incompatible with each other or can they go together? Can empowering leadership (i.e. participative, coaching, informing behaviors) stimulate reflectiveness and decisiveness? A 10-item Joint Decision-Making Questionnaire was developed and tested among supervisory officers (N = 87) and supervisory board members (N = 158). Reflectiveness and decisiveness were positively correlated, indicating that these tendencies can be reconciled in joint decision-making (Study 1). An examination of 44 supervisory teams further revealed that participative leadership relates to more reflectiveness and decisiveness, via cooperative trust and goal commitment (Study 2). Moreover, teams that experienced this team climate prior to COVID-19 reported that they acted more reflectively and decisively during this crisis (Study 3). Hence, participative leaders can foster reflectiveness and decisiveness, by promoting cooperative trust and goal commitment.