Chattaraj is a Professor of Chemistry , Indian Institute of Technology (IIT) Kharagpur, India and now he is an Institute Chair Professor there. He received his PhD from IIT Bombay. A former research associate of the University of North Carolina, Chapel Hill, USA, and FAU, Erlangen-Nürnberg, Germany, he was honoured with: University Gold and Bardhaman Sammilani medals; INSA (Young Scientist) medal; CRSI Bronze and Silver medals; IAAM medal ; Associate, Indian Academy of Sciences; BM Birla Science Prize; BC Deb Memorial award. He is a member of the Indian Natl. Science Academy; Indian Academy of Sciences; National Academy of Sciences, India; West Bengal Academy of Science and Technology; and FWO, Belgium. He is Sir J.C. Bose National Fellow. He was Convener, Center for Theoretical Studies , Convener, Kharagpur Local Chapter, INSA, council member of CRSI, Dean (Faculty) and Head of the Chemistry Department of IIT Kharagpur.