The following year saw both Helly and his wife employed as mathematicians by the Signal Corps in Chicago. Helly again took up familiar work since he was preparing mathematics training manuals, while his wife taught mathematics.
Ang mga sumusunod na mga taong nakakita at parehong Helly ang kanyang asawa ang trabaho bilang mathematicians ng Signal Corps sa Chicago. Helly muli took up pamilyar sa trabaho dahil siya ang paghahanda ng matematika training manual, habang ang kanyang asawa ang nagtuturo sa matematika.