Results from the US federally sponsored Maternity Practices in Infant Nutrition and Care (mPINC) Survey were leveraged to bring together facility leaders who influence hospital breastfeeding practices to improve adherence to the standard of care. Eighty Massachusetts hospital and birth center maternity care decision makers, representing 34 of the state's 50 facilities (covering 74% of births), participated. Active engagement in problem solving generated a sense of enthusiasm and accomplishment. The collaborative spirit across traditionally competing hospitals demonstrated that these leaders clearly were committed to quality and to improving their facilities' practices. An important aspect of the summit was to foster transformational leadership by supporting participants in their envisioning, energizing, and enabling roles within their organizations. Cooperation from a broad array of stakeholders is important to drive change.