In September, 1985, Ribadu was appointed Assistant Lecturer in the Department of Veterinary Surgery and Reproduction, University of Maiduguri. His quest for additional qualifications fuelled by a burning thirst for knowledge made him to return to ABU Zaria from 1986 to 1988 for a Master of Science degree in Theriogenology. In 1990, Professor Ribadu was awarded a Commonwealth Scholarship for a PhD at the University of Liverpool., United Kingdom. In 1997, Professor Ribadu was awarded a 2‐ year Postdoctoral Fellowship by the prestigious Japan Society for the Promotion of Science (JSPS), tenable at Rakuno Gakuen University, Ebetsu, Hokkaido, Japan. 

In terms of academic career, Professor Ribadu rose through the ranks and was appointed Professor of Veterinary Reproduction at the University of Maiduguri in October 2002. Professor Ribadu held several academic and administrative positions at the University level. 

In April 2004, President Olusegun Obasanjo appointed Prof A. Y. Ribadu as the Vice‐Chancellor, Federal University of Technology, Yola (FUTY), now Modibbo Adama Univeristy. As the Vice‐Chancellor of FUTY from 26th April 2004 to 25th April, 2009, Professor Ribadu brought positive changes to the university’s landscape. 

Professor Ribadu served as external assessor and examiner to Ahmadu Bello University, Zaria, University of Ibadan and Usmanu Danfodiyo University, Sokoto. He is a competent, efficient and resourceful researcher with enviable research outputs. He has to his credit several publications in peer‐reviewed scientific journals and others presented at learned national and international conferences. His pioneering work on “ultrasonography and endocrinology of ovarian cysts in cattle” at the University of Liverpool has been cited extensively. Professor Ribadu spent one-year sabbatical leave and a further one and half years on leave of absence at the National Universities commission (NUC), Abuja (June 2009 to November 2011) where he served as Chairman, Committee on Monitoring of Private Universities (COMPU). Furthermore, he also served as Visiting Professor/Advisor to Nigerian Turkish Nile University (NTNU), Abuja from January 2012 to June 2013. Professor Ribadu assumed duty as a Professor in the Department of Theriogenology, University of Abuja in November, 2013. He was a Visiting professor at Guru Angad Dev Veterinary and Animal Science University (GADVASU) Ludhiana, Punjab, India in 2023. Before his appointment as the ES boss, Professor Ribadu was a visiting professor at the Commision.

In December 2013, the new ES of NUC was appointed as the pioneer Vice-Chancellor of Jigawa State University,Kafin Hausa which was later renamed Sule Lamido University. He steered the affairs of university, overseeing its take-up and the enrolment of the first student of the University and bowed out, after five years, with a grand style maiden convocation of the university.

Professor Ribadu is a member of several national and international professional bodies. He was awarded membership diploma, College of Veterinary Surgeons of Nigeria (MCVSN) in 2003 and Fellow, College of Veterinary Surgeons Nigeria (FCVSN) in 2011. He is also a member of Nigeria Institute of Management (MNIM), Honorary Fellow, Nigerian Institution of Agricultural Engineers (FNIAE), Fellow, Global e‐policy and e‐government institute, Sungkyukwan University, Seoul, South Korea and Fellow Institute for Government Research and Leadership Technology (2014). Professor Ribadu was the Secretary-General of Association of West Africa Universities (AWAU). He was also conferred with an Honorary Degree (Honoris Causa) by the Commonwealth University, London on Thursday, 14th December, 2017. Additionally, he is a member, TETFund’s National Research Fund Screening and Monitoring Committee (NRF) from 2021 to date.

Professor Ribadu’s academic and administrative pursuits have provided him with opportunities to travel to many countries including Australia, Belgium, Cameroun, Egypt, France, Germany, India, Japan, Libya, Qatar, Saudi Arabia, South Africa, South Korea, The Netherlands, United Arab Emirates, United Kingdom and United States. Professor Ribadu is fluent in Fulfulde, Hausa, English and a bit of Nihongo (Japanese). 

Professor Ribadu is happily married to Aisha Mohammed Abba and is blessed with three children (Asma’u, Hadiza and Zaynab). His hobbies include reading, travelling and playing table tennis.