
Rowan Nicks was born in New Zealand on 24 February 1913. He studied medicine at the University of Otago in Dunedin and, on graduation in 1937, worked as an intern at Auckland City Hospital. After his internship, he moved to the United Kingdom to further his surgical studies, working as a demonstrator in anatomy at Middlesex Hospital, London.
Rowan served as a Surgeon Lieutenant in the Royal Navy during the Second World War. In 1945, he was appointed Officer of the Order of the British Empire and became a Fellow of the Royal College of Surgeons.