World Harvest Mission was organized under the leadership of Dr. Jack Miller, a pastor, evangelist and author. In the late 1970s, the missions-outreach of the congregation he founded and pastored, New Life Presbyterian Church, was spreading beyond that local body.
Other church leaders gathered with Dr. Miller to work together in wider ministry. After many informal missions trips to Ireland and Uganda, World Harvest Mission was officially established in 1983.
Bob Osborne was appointed as executive director of the mission in June of 2005. Today, WHM has 190 missionaries serving in 15 countries.
WHM is a nondenominational foreign mission agency, founded in the reformed tradition. As a faith mission, WHM receives no assurance of funds from any source.