[4] After a profound spiritual experience in 1950, Kuria resigned from teaching and took up full-time church work.

On April 25, 1970, he was consecrated assistant bishop of the diocese of Nakuru, by Archbishop Leonard Beecher.

In January 1976, he was enthroned Bishop of the diocese of Nakuru by Archbishop Festo Olang'.

Kuria died on 19 September 2005, aged 76, in Nairobi after suffering a heart attack.

Bishop Kuria's brother called Amon Mbugua was a long-time lay reader at St. John's in Kabuku.