Prof. Otubu joined the Department of Private and Property Law, Faculty of Law in 1997 after a stint with the Faculty of Law, Ogun State University (now Olabisi Onabanjo University) Ago Iwoye. He obtained his LLM from the University of Lagos in 1995 and PhD from Obafemi Awolowo University, Ife in 2015. He was a joint winner of the Femi Okunnu Research Grant in property law and a member of the Faculty Research Committee. Prof. Otubu teaches Land Law, Conveyancing Law, and Environmental Law at undergraduate level and Secured Credit Transaction, Planning law, and Compulsory Acquisitions law at Postgraduate level.

A scholar of many parts and diverse interests, Prof. Otubu is an associate member and one-time Chairman, Examination Committee of the Chartered Institute of Marketing of Nigeria and a fellow of Institute of Security Nigeria. His main area of research interest includes Housing and Environment. He is a co-author of the book Land Use Policy and Management in the 21st Century Nigeria: Need for Reforms published by the Department of Private and Property Law. Prof. Otubu is a renowned author who has published widely in both local and international peer reviewed journals.