Organization Army Council

Canton Secondary School, Cardiff (mathematics teacher | one year)

University College of Wales, Aberystwyth (assistant mathematics lecturer | 1926-1928 | vice-president | 1967-1976)

Meteorological Office (Shoeburyness | 1928 | Porton | 1929-1941 | Head of the Meteorology Section | 1938 | Director General | 1953-1965)

Tank Armament Research (superintendent | 1943-1945)

Radar Research and Development Establishment, Malvern (superintendent | 1945-1947)

Royal Military College of Science, Shrivenham (Bashforth Professor of Mathematical Physics | 1947-1953)

Atmospheric Pollution Research Committee (chairman | 1950-1955)

Beaver Committee (member)

Natural Environment Research Council (NERC | chairman | 1966-1968)