Research on leadership has been a fascinating area among Organizational Behavior and Human Resource Management researchers for the impact leaders make. The study adopted a qualitative case study method and conducted interviews with 26 managers from the top, middle, and lower management levels of BRAC. However, there was a cluster of behaviors and traits displayed across the levels, and we termed it as an inspirational style of leadership. We have also identifi ed four dimensions of NGO success as perceived by the leaders: work orientation, culture and governance, operational aspect, and HR practices. The First fi ndings, of this study, identify a unique leadership style i.e., inspirational leadership style. Second, it identifi es the specifi c leadership attributes that exist in a successful NGO. Third, it provides glimpses into the organizational structure and governance of a successful NGO. Fourth, the NGO eff ectiveness parameters developed that can be used and validated as a measurement tool by quantitative researchers.