Beatus Kinyaiya was born on 9 May 1957 at Shimbwe, in the Roman Catholic Diocese of Moshi in the Kilimanjaro Region of Tanzania.
He then completed his A-Level studies at the Itaga Minor Seminary in the Tabora Region.
[1][2] He studied philosophy at the Major Seminary of Our Lady of the Angels, Kibosho, in Kilimanjaro Region.
He then transferred to the Saint Charles Lwanga Senior Seminary at Segerea in the Archdiocese of Dar es Salaam where he studied Theology.
[1][2] After his ordination he ministered in different roles and various locations including as follows:[2] On 22 April 2006, The Holy Father Benedict XVI appointed him Bishop of the Roman Catholic Diocese of Mbulu.