Rev. Nyatuka is currently the Senior Pastor at Calvary Covenant Center, Komarock, Nairobi. He also serves as the Nairobi Region Overseer of Pentecostal Church of God, a worldwide umbrella with which the congregation that he shepherds is affiliated. He has conducted missions in the USA, South Africa and the whole of East Africa.
In the CBO, Rev. Nyatuka serves as the organization patron.