In 2001 Changsub, and his family, came to Saskatchewan from Korea to study at Briercrest Seminary in Saskatchewan. During their time living there, they visited a nearby reserve and God used that visit to start preparing their hearts to return to Canada to work among the First Nations. In 2005, Changsub completed his studies, and they returned to Korea. After a time, SIM Korea suggested they return to Canada to serve the Lord. After two years of prayer, they were convinced that God had called them. When they returned to Saskatchewan in 2009, they served the First Nations in Regina and surrounding areas. They lead Bible studies, visited homes and mentored people. In 2013 they moved to Prince Albert, SK where they serve as Community Chaplains, visit and serve the First Nations people in the hospitals, prisons, and communities. They also conduct outreach visits to Northern Saskatchewan First Nations reserves.