His mother Helene "Ellen" Guernon and father Jean-Baptiste "John" Mailloux were of French descent who migrated to the US during the Quebec diaspora.

[3][4] In 1905, he obtained his bachelor's degree from Brooklyn Polytechnic Institute[5] before receiving MSc in electrical engineering.

[6][7] In pursuit of professional learning, he was one of the leading pupils of Dr. M. I. Pupin, who was a lecturer on advanced theory of electrical engineering at Columbia University.

During his early career, Mailloux designed very complex dc power systems for large buildings, many of them in New York City where he maintained his office.

The battery discharge circuitry might then utilize the same booster in reverse to slightly reduce the voltage in order to prolong the life of the bulb.

He advocated for all electrical technologists in the AIEE because "in union there is strength" and were in support of admitting women to membership in their organization.

In the 1921 International Conference on Large Electric High-Tension Systems in Paris, he was honorary president, acting also as United States delegate at biennial meetings.

On June 21, 1883, Cyprien Mailloux was married to Emma Bertha Debs in Terre Haute, Indiana where they met.