Lewison and Jill, along with their four children, have been working in Tanzania for several years and their main focus is reaching the children of that nation. Jill founded the Emmanuel Center, a home for äccepted children (previuosly classified as street kids, orphans and vulnerable children), which currently has 22 boys living at the center. They have provided a home, education and a feeling of security for these young children who have been living on the streets of Moshi. These young boys now have an understanding of who God is and that Jesus died for their sins. They are learning how to be responsible for their lives under God.

In addition to these children, they have a heart for the local church and the villages. They have a vision to assist in the educational programs to enable village children to receive a quality education, in order to enable them to break out of the cycle of poverty that currently exists in Tanzania.