Dr. S. Lakshmivarahan (Varahan for short) joined the University of Oklahoma in the fall of 1978 where he served as faculty for the next 41 years at the School of Computer Science, University of Oklahoma (OU). After a total of 46 years of full time in academia, he retired as a George Lynn Cross Research Professor Emeritus in 2019. From 1973-1978 he held postdoctoral and faculty positions at Brown University, Yale University, and Indian Institute of Technology, Madras, India. He obtained his PhD in 1973 from the Indian Institute of Science in Bangalore, India. He is the author/coauthor of 7 books, over 97 journal papers and over 120 papers at the international/ national conferences. He has supervised/co-supervised 33 PhD dissertations, and 42 MS theses. He is a Fellow of the IEEE and a Fellow of the ACM and has won OU Regents awards for both research and teaching. He was inducted into the Oklahoma Higher Education Hall of Fame in 2014. He has held short-term visiting appointments at leading academic centers in Brazil, Canada, China, England, Germany, India, Japan, Mexico, Taiwan, Thailand, and USA.