David chaired the scientific committee of SEMICON 2017, an annual conference on emergency medicine organized by Society for Emergency Medicine, India, held at Kochi in March 2017. He is consultant of the World Health Organization for emergency medicine for South-East Asia and is a faculty member of WHO-USAID programs on Disaster Medicine. In the aftermath of the 2004 Indian Ocean earthquake and tsunami, David led a team of 9 volunteers from CMC and reportedly established 18 medical camps in a week's time which provided medical assistance to 2879 people. He was the organizing secretary of the "7th National Conference of Emergency Medicine" (EMCON 2005) held in October 2005 at Vellore and is the founder of Network of Emergency Physicians, India (NEPI), a web platform for exchange of information among emergency physician community. He sits in the board of advisors of "EMS Leaders Forum" and was a member of the three-member panel which designed courses for "Hospital Preparedness for Emergencies" (HOPE), a USAID-NSET initiative, in 2009. He has delivered several invited speeches or keynote addresses which include "National Assembly on Pediatric Emergency Medicine (NAPEM) 2011" and "Conclave on Legal and Ethical Challenges in Healthcare Ecosystem" of 2017. He has also been associated with medical conferences as a patron or resource person and has participated in continuing medical education programs.