BSc Manch 1954, MSc 1955, MB ChB 1957; MRCP Lond 1957, FRCP 1970.
After qualifying, Evanson held various positions at MRI. Around 1960 Evanson left Manchester to spend a year as registrar at the Radcliffe Infirmary, Oxford, before returning to MRI as senior registrar in 1961. In 1963 he was appointed lecturer in medicine at the University of Manchester, being promoted to senior lecturer in 1968. In 1970 Evanson was appointed to the new chair of medicine at South the University of Manchester Hospitals. From 1979 to 1983 Evanson was also dean of the Medical School at the University of Manchester. He was a fellow of Manchester Medical Society .