Sujay Ghosh did his Ph.D. under the supervision of Prof. Subrata Kumar Dey, the former Vice Chancellor of the West Bengal University of Technology, Kolkata, India in the year 2009. He served as Assistant Professor of Zoology in an undergraduate college affiliated to the University of Calcutta and later he joined the Department of Zoology, University of Calcutta in the year 2013 as an Assistant Professor of Genetics. His primary research interest is to search maternal epidemiological, genetic and epigenetic risk factors that cause nondisjunction of chromosome 21 in human oocyte and subsequent childbirth. In addition to that, he has initiated work to characterize the genetic risk factors for idiopathic infertility among Indian men. Besides human genetics group, a separate team of young researchers is engaged in characterizing the adverse effects of Bisphenol A and Daminozide (fruit ripening retardant) at the molecular level in model organism fruitfly Drosophila melanogaster under his supervision. His unique work in the field of Down syndrome research helped him to earn international reputation and international research collaborations with Prof. Eleanor Feingold from University of Pittsburgh, Pennsylvania, USA and Prof. Stephanie Sherman from Emory University, Atlanta, USA. Presently he has 45 research articles in the journals of national and international repute. He has written five book chapters and several popular articles. He uses to deliver lectures for popularising science among the students.