Indra J. J Das is an internationally acclaimed medical physicist with expertise in radiation dosimetry, dose calculation, dose specification, small-field dosimetry, treatment planning, nanoparticles, MR-linac, and proton beam therapy. He received his BSc and MSc degrees from Gorakhpur University followed by a Dip. in Radiological Physics (DRP) from Bombay University while being trained at Bhabha Atomic Research Center, Bombay, India. He earned his MS in Medical Physics from the University of Wisconsin Madison (1984) and PhD from the University of Minnesota, Minneapolis (1988). He has worked in major academic centers including the following: the University of Massachusetts Medical Center, Fox Chase Cancer Center, University of Pennsylvania, Indiana University School of Medicine, and NYU Medical Center. He is a fellow of many societies such as FIPEM (UK), FAAPM, FACMP, FACR, and FASTRO. He is also a recipient of the Farrington Daniels Award of the AAPM (1988) and the Dr. Ramaiah Naidu Award for Lifetime Achievement, AMPI (2015). He was awarded the academic Gold Medal by the Institute of Physics in Engineering and Medicine (IPEM), England, in 2021 and the Edith H Quimby Lifetime Achievement Award of the AAPM in 2022, along with many other accolades.