He was a rationalist architect, but was a strong advocate for the neoromanticism style of the time, preferably the style of Louis XIII. Hermant advocated for concrete construction and erected two of the first reinforced concrete buildings in Paris, collaborating with the French engineer Edmond Coignet (1856–1915), who patented his system in 1892.
Hermant was a professor at the École des Beaux-Arts in Paris and served as chief architect for the city.[3] He employed the Danish architect Hack Kampmann during Kampmann's stay in Paris in 1883.
^ abcdefRingrose, William H. A. (1910). Ringrose, H. (ed.). The International Blue Book (in French). International Who's Who Publishing Company. p. 611.