 He was ordained to the priesthood at Hoima on 9 August 1969 and served as priest in Hoima Diocese until 21 May 1990.On 21 May 1990, Byabazaire was appointed coadjutor bishop of the Roman Catholic Diocese of Hoima.He was ordained bishop on 18 August 1990 by Archbishop Luis Robles Díaz†, Titular Archbishop of Stephaniacum, assisted by Archbishop Emmanuel Wamala,
Archbishop of Kampala Archdiocese and Bishop Albert Edward Baharagate, Bishop of Hoima.