The Sower International Evangelical Ministry (SIEM) is the evangelical arm of the church and was founded in London in 1987 by Apostle Ayo Omideyi. Its focus is national and international evangelism.

SIEM has organised revival meetings within the UK and abroad over the years.  International meetings in the past have been held in India, Philippines, USA, Ghana, West Indies, Romania, Kenya, Tanzania and Nigeria.  It seeks to spread the gospel, particularly to the less privileged parts of the world.