After wartime service with the Royal Artillery, during which he saw action in Normandy in 1944, Germany in 1945 and was then posted to India, he was ordained in 1952 and began his career with a curacy at St David's, Pilton, Edinburgh[3] and subsequently at St. Andrew's Church, St. Andrews, where he was also Anglican chaplain to the university. It was here that he met his wife, Susan Martin, an undergraduate who was president of the Anglican Society.
He was appointed Rector of St Cuthbert's, Hawick[4] in 1955 and he and Susan were married in the summer of 1956. After 5 years, Crosfield was asked to be Chaplain of Gordonstoun School and his appointment coincided with the arrival at the school of the young Prince Charles, whom he later prepared for confirmation.
In the 1980s, horrified by the effects of unemployment on young people, Crosfield set up the St. Mary's Cathedral Workshop, which has looked after the fabric of the Victorian Cathedral whilst training apprentice stonemasons and reviving the skills and trades associated with old buildings that were in danger of disappearing.
Moving to Penicuik, near Edinburgh, in retirement, he continued his work as a priest as part of the Ministry Team of St. James the Less Episcopal Church.