Aged 58, Fr. Odiwa was ordained a Clergy of Homabay in July 1993. The alumnus of the Rome-based Urbaniana University from where he obtained his Doctorate in Canon Law completed his formation program in Theology at St. Matthias Mulumba, Tindinyo in Kenya.
In his 27 years of Priesthood, the Bishop-elect served as the Vicar General for Homabay Diocese and as Parish Priest in various Parishes of the Diocese.
His most recent appointment was the assistant Parish Priest and in-charge of Italian speaking community of the Annunciation Church Hectorville Parish in Australia as well as the defender of Bond Tribunal of the Province of Adelaide South Australia and Northern Territories.