 Whilst working at Porton Down he was put in charge of the notorious 1942 trial which involved the release of anthrax spores over Gruinard Island as part of a biological warfare project.When the war ended, he was made Chief Superintendent of the Radar Research and Development Establishment, Malvern, a position he held until 1947, when he was appointed Professor of Mathematics at the Royal Military College of Science, Shrivenham, Wiltshire.He was Director-General of the UK Met Office from 1953 to 1965 and Vice-President of the University College of Wales, Aberystwyth from 1967.