Father John J. Lange, one of seven children, two brothers and four sisters, was born to John and Cecelia Roediger Lange in Dubuque, Iowa, on January 18, 1931. He attended Nativity Parish grammar school and Loras High School, both in Dubuque and entered Maryknoll on November 13, 1949.
Father Lange was ordained on June 14, 1958 and assigned to the Maryknoll Development House in Minneapolis, Minnesota until April 1962, at which time he traveled by boat to the Tanzania, East Africa Region. Because of his mission experience Father John was reassigned to Development work in July 1968. He was appointed Regional Director and Superior of the Minneapolis House in 1969 and continued in this position, until he was reassigned to Africa on August 1, 1973.
After spending time in Maryknoll's Dar es Salaam Society House in Tanzania, he has served seven years in ministry at the Maryknoll House in Nairobi, Kenya. Presently he is serving as chaplain to the Little Sisters of St. Francis in Nairobi while continuing his ministry in the Mukuru slums of Nairobi.