To assist him in the work he took on several people who were to play important roles in the design and construction of the Eiffel Tower, including Maurice Koechlin, a young graduate of the Zurich Polytechnikum, who was engaged to undertake calculations and make drawings, and Émile Nouguier, who had previously worked for Eiffel on the construction of the Douro bridge.
Družba je dobila pogodbo za viadukt Garabit, železniški most pri Ruynes en Margeride v departmaju Cantal (zgrajen 1880 – 1884).