He became a teacher at École Polytechnique in 1807 and, one year later, he was appointed to assist the professor of applied analysis and descriptive geometry.
Siya ay naging isang guro sa École Polytechnique sa 1807 at, sa isang taon, siya ay hihirangin upang matulungan ang mga propesor ng mga mailalapat na pagtatasa at naglalarawan geometry.