Sarvagya Singh Katiyar popularly known as S. S. Katiyar, is an Indian scientist specializing in enzymology, and the founder Director of Dr. Ram Manohar Lohia National Law University, Lucknow. He is a former president of the Association of Indian Universities and a former vice chancellor of Chhatrapati Shahu Ji Maharaj University, Kanpur and Chandra Shekhar Azad University of Agriculture and Technology. He was honoured by the Government of India in 2003 with Padma Shri, the fourth highest Indian civilian award, followed by Padma Bhushan, the third highest civilian award, in 2009. He was born in 1935 in India. Sarvagya Singh Katiyar obtained his BSc and MSc from Agra University. For his doctoral research he joined National Sugar Institute, Kanpur and worked in the area of chemical kinetics in solutions and earned his PhD degree (1962) under the guidance of NA Ramaiah. Later on his attention moved towards the study of structural organization of the enzyme fatty acid synthetase complex when he worked with John W Porter at the University of Wisconsin, Madison. He was the first to determine the kinetic mechanism of this multienzyme complex. Katiyar joined the Department of Chemistry, Indian Institute of Technology (IIT), Kanpur (1961). He became the Head of Department of Chemistry, IIT Kanpur in 1989 after which he moved to the University of Kanpur in 1994 as Vice-Chancellor where he continued for four tenures till 2007.

Katiyar made significant contributions in the areas of enzyme reaction mechanism, function and stabilization of enzymes in apolar solvents, architecture of enzymes, particularly, site-specific antibodies. Using appropriate chemical modifiers and affinity and photo-affinity labels, Katiyar's work enhanced the understanding of catalytic domain of kinases and dehydrogenases. Systematic studies initiated by him on the activity and mechanism of enzymes hosted in reverse micelles in apolar solvents greatly enhanced the potential of the usage of enzymes for catalysis of reactions of industrial importance. His researches on antibodies, specific for NADPH binding region of enzymes (possessing dehydrogenase activities), opened up immense potential for the use of these antibodies and monoclonal antibodies as diagnostic tools. He has published over 125 research papers and mentored a large number of students including about a dozen Masters and 14 PhD students. Katiyar, a visiting professor at Tokyo University, received Acharya P. C. Ray Memorial Medal in 1990 and Professor B. N. Ghosh Memorial Award in 1995. In 2001, he received the Soka University Award of Highest Honor and he received three awards in 2003, the New Millennium Plaque of Honour for Chemical Sciences, Vigyan Gaurav Award from the Government of Uttar Pradesh and the national civilian award of Padma Shri from the Government of India. He is also a recipient of Gold Medal for Excellence in Science (2006), Asutosh Mookherjee Memorial Award (2008) and R. C. Mehrotra Memorial Life Time Achievement Award (2009). The Government of India honoured him again in 2009 with Padma Bhushan.