Prof. Ajay Kumar Sood is the Principal Scientific Advisor to the Government of India (PSA to GoI) from April 2022. He is also the Chairperson of the Prime Minister’s Science, Technology & Innovation Advisory Council (PM-STIAC). Prof. Sood is also a National Science Chair at the Indian Institute of Science (IISc) Bangalore. He was a member of the Prime Minister’s Science, Technology, and Innovation Advisory Council (PM-STIAC) from 2018 to March 2022 and from 2009 to 2014, he had also served as a Member of the Scientific Advisory Council (SAC) to the Prime Minister of India. Prof. Sood has a Doctorate in Physics from IISc Bangalore. His research interests include the Physics of Quantum materials, soft and active matter. He has published more than 450 papers in peer-reviewed journals and holds several patents. His work has been recognised by many awards, including the Padma Shri, the fourth highest civilian award in India. He was President of the Indian National Science Academy (2017-19), President of the Indian Academy of Sciences (2010-12), and Secretary-General, The World Academy of Sciences (TWAS), Trieste, Italy (2013-2018). He was elected to the Fellowship of the Royal Society, UK (FRS) in 2015.