Dadun is a senior public health researcher with expertise in health economics, health-related stigma, disability, socio-economic development, high risk behavior on HIV/AIDS, NTD and narcotics, and program evaluation. He has served as a senior researcher, principal investigator, team leader, lecturer, consultant, with collaborations involving the Ministry of Health, BPOM, Bappenas, BNN, UNICEF, USAID, the Global Fund, CHAI, FHI360, and VU Amsterdam. Currently Executive Secretary at the Center for Health Research, Faculty of Public Health, Universitas Indonesia,