[4] Fleming spent the years from 1899 to 1902 with Westinghouse Electric Company at its East Pittsburgh, Pennsylvania works before returning to take up a post in Trafford Park.
During WW I, Fleming lead a research team which made important progress in electrical technology for detecting submarines.
The department attracted a succession of men of outstanding ability, who responded to Fleming's inspiration by making many notable contributions to pure and applied science.
Particularly important was the development of demountable high power thermionic valves which helped make possible the installation of the first radar stations just before the outbreak of war in 1939.
[2] After the Second World War, as Chairman of the Federation of British Industries Overseas Scholarship Committee, he led an engineering mission to Latin America and returned much impressed with the potentialities of the young republics.