Dr. Deb began his scientific career as a PhD student in Centre National de la Recherche Scientifique (CNRS) in France on scholarship from Ministère de l’ Enseignement supérieur, de la Recherche et de l’Innovation (MESRI). At CNRS he worked under the mentorship of Dr. Didier Trouche who is the Director of CNRS in Toulouse, where his work uncovered how epigenetic stress mediated genome-wide accumulation of read-through antisense RNAs triggers cellular senescence which is arguably the most critical failsafe mechanism that counteracts tumorigenesis. He was simultaneously also involved in a project at Leibniz Institute on Aging in Germany that linked the identification of an evolutionary conserved regulator of entry and exit of pluripotency to organ homeostasis and regeneration.

Subsequently, he joined Stanford University as a postdoctoral scholar at the Stanford Institute for Stem Cell Biology and Regenerative Medicine (ISCBRM) in the Department of Obstetrics & Gynecology in Stanford School of Medicine. He worked with Prof. Roger Pedersen and under co-mentorship of the pioneers like Gairdner laureate Prof. Azim Surani (International Gairdner Award 2018, Discovered Genomic Imprinting, Single-Cell RNA-seq and specifier of mammalian and more recently human germline) from University of Cambridge and NIH Distinguished Investigator Dr. Shiv Grewal (Discovered the mechanism of heterochromatin assembly) from National Institutes of Health (NIH). His work appealed to Nobel laureates like Prof. Andrew Fire (Nobel Prize 2006), a pioneer in gene silencing by RNA interference (RNAi) from Stanford University, who fondly agreed to guide him. Owing to the relevance of his work to maternal and child health, he has been the member of Maternal and Child Health Research Institute (MCHRI) at Stanford School of Medicine.