Varun is working on the genetics of autism. He is testing the genetic basis of mathematical ability, empathy, systemizing, and autistic traits in the typical population. His work has used candidate gene/SNP methods, focusing on genes such as GABRB3 and OXTR, as well as whole genome association methods.

Prior to moving to Cambridge he completed a Masters in Neuroscience at University College London, and a Bachelors in Zoology, Madras Christian College, India.