VAS退休为新德里国家疟疾研究所研究所的高级科学家 - 这是印度医学研究委员会的APEX组织。He was the officer-in-charge of the Field Station based in Assam, northeast India beginning 1988 till his superannuation in 2016. His primary research interests included ‘Epidemiology and Control of Malaria’ testing newer interventions that culminated in number of technologies and implementation in the control programme resulting in substantial transmission reduction.