Susantha Rasnayake is a Senior Lecturer attached to the Department of Sociology, University of Peradeniya, Sri Lanka. He has worked as a Temporary Lecturer both in the Department of Sociology, University of Colombo, and the Department of Social Sciences, Sabaragamuwa University of Sri Lanka from 2007 to 2011. He earned his BA (Hons.) in Sociology in 2006 and MA in 2011 from the University of Peradeniya. Subsequently, he earned his MPhil mastering in Urban Anthropology in 2016 from the same University. In 2024, he earned his PhD in Social Work at Masaryk University, in the Czech Republic. His areas of expertise are self-violence (suicide and self-harm), urban space and development, development studies, and social policy.