White married Laureate May O'Hara on June 25, 1955. He worked as a medical missionary for New Tribes Mission from 1955 to 1964. White then became associate general secretary of the International Fellowship of Evangelical Students of Latin America. White where his family immigrated to Canada in 1965, and he completed his psychiatry residency in Winnipeg, Manitoba. He then became an assistant professor of psychiatry at the University of Manitoba, as well as the pastor of the Church of the Way in Winnipeg. He published 25 books, as well as several papers and study guides. He was a sought-after speaker who spoke at churches, conferences, and leadership events all over the world. White eventually went to Vancouver, British Columbia, where he assisted in the building of a Vineyard church (Surrey Vineyard) and became involved in the larger Vineyard Christian Fellowship. White died in 2002, but his written ministry lives on with over 1.5 million copies of his books in print.