At Birmingham Idowu-Fearon read "Islam, And Christian-Muslim Relations" and wrote "a major paper on 'The Status of a Non-Muslim (thumma) In an Islamic State'". It was then, he says, "I knew the Lord was calling me [to be] a bridge builder." After his studies in the United Kingdom, Idowu-Fearon continued his studies in Nigeria with a second master's degree in sociology from Nigeria’s Ahmadu Bello University Zaria. This was followed with a PhD in Sociology and a Postgraduate Diploma in Education from Ahmadu Bello University. Later, as a bishop, Idowu-Fearon served as a research fellow at the Ahmadu Bello University in the field of "determining the influence of politics and religion on development". In 1993, Idowu-Fearon received a D.Min. from the Hartford Seminary in Hartford, CT, USA. In 2002, Idowu-Fearon received masters and doctors degrees in Arabic and Islamic studies with special interest in Christian-Muslim relations from the University of Jordan. In 1971, Idowu-Fearon was ordained as a priest of the Anglican church and nineteen years later he was made a bishop. From his ordination to the priesthood in 1971 to 1990 when he was consecrated bishop of the Diocese of Sokoto, Idowu-Fearon worked as the General Secretary for the Evangelical Fellowship of the Anglican Communion for Nigeria, and concurrently held the post of Warden of St. Francis Theological College, Wusasa from 1981 to 1984, when he became the Provost of St. Michael’s Cathedral. Bishop of Sokoto In 1990, Idowu-Fearon was consecrated as a bishop of the Diocese of Sokoto where he remained until 1998. During that time, he served as Warden at St Francis of Assisi Theological College in Wusasa and Provost of St. Michael’s Cathedral in Kaduna. After his consecration in 1990, Idowu-Fearon served (1) as a founding member of the Compass Rose Society, (2) as a founding member and one of the first three Presidents of the NIFCON( Network for Interfaith Concerns), (3) as a member of a 13-Member Committee of the Archbishop of Canterbury that looked into the responses to Lambeth Resolution 1:10 of 1998, and (4) on the Committee that produced the Windsor Commission Report of 2003.