Paul White worked at the Royal North Shore Hospital, Sydney, in 1936, and was Resident Medical Officer at Ryde District Soldiers Memorial Hospital in 1937. He was Superintendent of the Church Missionary Hospitals in Tanganyika from 1938 to 1942 and Home Secretary of the Church Missionary Society of New South Wales from 1943 to 1944. He wrote a book about the Church Missionary Society's work in Tanganyika, Doctor of Tanganyika (1942). He then practised as a rheumatologist from 1945 to 1973.
In 1960 White wrote the text for the pictorial work Jungle Doctor Panorama (with photographs by Ossie Emery and Edwin Udey). His non-fiction works for children include Jungle Doctor Attacks Witchcraft (1947), I.V.F. Invites a General (1948), a biography of British soldier Sir William Dobbie, Janet at School (1978) which looks at the daily struggles of a girl with spina bifida and How to Read the Bible Aloud (1983). White's non-fiction titles for adults include the motivational speaking instructional text How to Hold an Audience Without a Rope (1982) and Cricket and Christianity (1985), which he co-authored with cricketer Brian Booth. White also translated a number of Bible stories into Australian Aboriginal languages and creoles.