Eluvathingal Devassy Jemmis is a Professor of theoretical chemistry at the Indian Institute of Science, Bangalore, India. He was also the Director of Indian Institute of Science Education and Research, Thiruvananthapuram (IISER-TVM). He was born on 31 October 1951 in Chevvoor, Thrissur District, Kerala, India. Dr. Jemmis, after obtaining his BSc from University College, Thiruvananthapuram and St Thomas College, Thrissur and MSc from IIT Kanpur, joined Princeton University (1973) under the supervision of Profs Paul von Rague Schleyer and John Pople (1998 Nobel Laureate). He was awarded the PhD degree (1978) from Princeton. His primary area of research is applied theoretical chemistry with emphasis on structure, bonding and reactivity, across the periodic table of the elements. Apart from many of his contributions to applied theoretical chemistry, an equivalent of the structural chemistry of carbon, as exemplified by the Huckel 4n+2 Rule, benzenoid aromatics and graphite, and tetrahedral carbon and diamond, is brought in the structural chemistry of boron by the Jemmis mno  rules which relates polyhedral and macropolyhedral boranes to allotropes of boron and boron-rich solids. He has been awarded Padma Shri in Science and Engineering category (year 2014) by the Government of India.