Sisir Roy served as Professor at the Physics and Applied Mathematics Unit, Indian Statistical Institute, Kolkata during 1980-2014. He is a quantum physicist and his interest includes foundations of quantum theory, cosmology and brain function modelling, and higher order cognitive activities. He has published more than 150 papers in peer reviewed international journals and 12 research monographs/edited volumes by Kluwer Academic, World Scientific, etc. Professor Roy has worked as a visiting professor in various universities of USA and Europe. He currently holds the T.V. Raman Pai Chair Visiting Professorship at the National Institute of Advanced Studies, Indian Institute of Science, Bengaluru, India. His present focus of research is to pursue interdisciplinary research on quantum probability and cognitive science, information theory in living organisms, and neuroscience and consciousness.

His forthcoming monographs include topics like quantum effects in biology, and the role of noise in living organisms.