Snow served in several senior civil service positions: as technical director of the Ministry of Labour from 1940 to 1944, and as a civil service commissioner from 1945 to 1960. He was appointed a Commander of the Order of the British Empire (CBE) in the 1943 New Year Honours. Snow's was among the 2,300 names of prominent persons listed on the Nazis' Special Search List, of those who were to be arrested on the invasion of Great Britain and turned over to the Gestapo.