Willian Dun graduated from the University of Glasgow MB, CM in 1877 and gained his MD in 1880. He was House Physician to the Glasgow Royal Infirmary and House Surgeon to the Western Infirmary. In 1881 he became assistant to the Professor of Clinical Medicine at the University of Glasgow, teaching students on the wards of the Western Infirmary.

Dun was president of the College from 1921 to 1923. ]]>