After fulfilling his national service in the Royal Air Force, Jim Lotz graduated from Manchester University in 1952 and worked for a British trading company in Nigeria. In Kano, during a riot, he rescued a man from a mob and received an award for bravery. He emigrated to Canada in 1954 and enrolled at McGill University where he received his Master of Science and landed a summer job at Mcill's Subarctic Research Laboratory in Knob Lake, Quebec. He spent five summers as a meteorological and glaciological observer and wrote about it years later in The Best Journey in the World.
In 1959 he met Pat Wicks, they married and had two daughters.
In 1964 Jim enrolled in the PhD program in geography at the University of British Columbia but left after a year and took a position as assistant director of the Canadian Research Centre for Anthropology at St. Paul's University.
In 1973 he and his wife moved to Halifax where they spent the rest of their lives. Hale and irrepressible to the last, he welcomed visitors, seated in his favorite chair below a scene of Dawson in winter and surrounded by books.