Abstract: | All‐volunteer nonprofit organizations rely solely on the commitment of volunteers to support their operations. As such, it is important that leaders of these organizations, even though they are volunteers themselves, rely on professional skills in order to optimize their organization's volunteers capacity. In the present study, we investigated how volunteer leaders' reliance on effective management processes and a (de)motivating leadership style related to volunteers capacity. To this end, we relied on the Competing Values Framework (CVF) and Self‐Determination Theory (SDT), respectively. Results revealed a positive (unique) association between (the sum score of) the management processes of the CVF models, as well as (the sum score of) the motivating leadership styles and volunteers capacity. Bivariate analyses indicated that the management processes of each CVF model (i.e., human relations model, internal process model, open system model, and rational goal model) and each motivating leadership style (i.e., an autonomy‐supportive and a structuring leadership style) related positively to volunteers capacity. These findings have important practical implications as they revealed that it is crucial for volunteer leaders to implement effective management processes, while adopting a motivating leadership style. |