Hum Sub is run entirely by volunteers who bring to bear skills honed in their professional lives to put together its flagship events, Cary Diwali and Basant Bahar. The president helps give direction to the 15-member board and acts as liaison between the organization and the Town of Cary. Successive Hum Sub presidents have built upon the foundations laid by their predecessors, growing the organization into a model volunteer group from its humble beginnings in 2000. Over the years, both the scale and scope of Cary Diwali have expanded and this has largely been informed by the vision of the president. This role calls for year-long commitment of considerable time and effort, and enthusiasm to keep the volunteers motivated.