His first position in this capacity took him to Vesoul, but after that he moved to Paris where, in addition to his work as a mining engineer, he was soon employed as a teacher at the École Polytechnique and at the École des Mines.
Kanyang unang posisyon sa kapasidad na ito kinuha sa kanya upang Vesoul, ngunit matapos na siya ay inilipat sa Paris kung saan, bilang karagdagan sa kanyang trabaho bilang isang pagmimina engineer, siya ay lalong madaling panahon trabaho bilang isang guro at ang École Polytechnique at sa École des Mines.