Logan was clerk of the Court of the University of London, 1944–1948, then Principal of the University, 1948–1975. He saw to the acquisition or construction of seven university halls of residence and the purchase of an extensive site in Bloomsbury on which to build other new university buildings. He chaired the Association of Commonwealth Universities, 1962–1963, virtually authored the Universities Superannuation Scheme, took a leading part in providing social and athletic facilities for students on a university basis, and safeguarded the efficiency of the London hospital medical schools. The work is framed and glazed.