==Career==Nielsen worked as an electrical engineer for the Isko Company in Chicago from 1919 to 1920 and for the H. P. Gould Company in Chicago from 1920 to 1923.
В 1919-1920 годах работал инженером по электрике на "Isko Company", а с 1920 по 1923 — на "H. P. Gould Company".