After graduating from Cambridge, Guthrie was appointed as an Assistant in Mathematics at the University of St Andrews. While teaching at St Andrews he undertook research for his doctorate which was awarded in 1932. In 1933 he was appointed Professor of Mathematics and Natural Philosophy at Magee University College, Londonderry. In addition to this post he was appointed he was elected Bursar of Faculty in 1945, then Principal in October 1958.
It was widely expected that Magee College would become the second university in Northern Ireland when a committee was set up to report. However the committee proposed that the second university be established at Coleraine rather than Londonderry and Guthrie resigned from Magee College on 30 September 1968, the day before the new University of Ulster opened at Coleraine.
Guthrie was a Fellow of the Royal Astronomical Society, a member of the Irish Astronomical Society, and of the Edinburgh Astronomical Society. He was a member of the Edinburgh Mathematical Society, joining in December 1926. He was elected to the Royal Society of Edinburgh on 6 March 1933, his proposers being Herbert Stanley Allen, Herbert Westren Turnbull, David Jack, Edward Thomas Copson.
An obituary, written by H A Brück, appears in the Royal Society of Edinburgh Year Book 1979, pages 35-36.
We give a version of this obituary at THIS LINK.
Guthrie married Thelma Pate. The announcement of their engagement reads:-
Article by: J J O'Connor and E F Robertson