 Radkowsky was an Orthodox Jew, a תלמוד חכם, finished Shas twice, and wrote several articles on miracles and science.Radkowsky worked on nuclear reactors at the Argonne National Laboratory, in the 1930s, and also worked for the Singer sewing machine firm.He was a civilian nuclear physicist in the US Navy from 1938 to 1972, where he was chief scientist of the Bureau of Ships' nuclear propulsion division, and in which role he worked closely with Admiral Hyman G. Rickover.