Prof. Jai Krishna has more than 50 years of experience in teaching research in Geology. He commenced University teaching and research in 1964, and formally retired in 2011 as Professor and Head, Centre of Advanced Study in Geology, Banaras Hindu University, India. Prof. Krishna completed his Doctoral studies from the University of Lucknow in 1968 and his work is on "the ammonoid bearing Callovian-Albian succession of Jaisalmer". Prof. Krishna carried out post-doctoral studies at McMaster, Canada, jointly with Prof. Gerd Westermann in 1979, 1982, and 1985 on the Jurassics of Kachchh, Jaisalmer, Spiti, and Kumaon Himalaya. During the 1980s and 1990s, Prof. Krishna travelled extensively across the world as Visiting Professor/Scientist/Fellow, inclusive of the coveted Marie Curie Fellowship of the European Economic Community. He realized collaborative researches, participated and chaired conferences, delivered invited lectures, visited stratigraphic sections, consulted type collectionsin Canada, USA, Argentina, Brazil, France, Germany, Switzerland, Netherland, UK, Spain, Belgium, Italy, Russia, Poland, Austria, Japan, China, Australia, Singapore, Malaysia, Indonesia, Thailand and Myanmar.

His focus has been ammonoid and sequence stratigraphy based applicative Mesozoic geology, biogeography, and integrated dynamics. Prof. Krishna has published about 100 research papers in peer reviewed reputed journals inclusive of Nature, more than 50 alone on the Kachchh Jurassic; developed a highly resolved ammonoid zonal scale in the Kachchh Jurassic; formulated comprehensive 1^st to 3^rd order sequence stratigraphic framework for the Gondwanian Tethyan Margin in India; Spitiian (Late Permian - Pliensbachian),  Kachchhian (Toarcian - Barremian), and Dravidian (Aptian - early Early Eocene) respectively in the north, west, and east sectors. Prof Krishna at present continues to be actively focused on the riddles of the Indian Mesozoics andrelated hydrocarbon exploratory geological aspects.