[1] He entered the public service and became maître des requêtes, (a higher level lawyer, or 'procureur') in 1631 for Louis XIII of France.

[1] In 1640 le Tellier was appointed Intendant of Justice for the French military stationed in Piedmont, Italy.

[1] As Chancellor, he also reestablished, in April 1679, the teaching of Civil Law at the University of Paris after Pope Honorius III had prohibited it on 11 May 1219.

[3] Le Tellier, who despised Protestantism, was one of those who influenced Louis XIV to revoke the Edict of Nantes which had previously provided religious freedoms to them.

Le Tellier also amassed great wealth during his life and left two sons, one being famous statesman Louvois who also served France as Secretary of State for War, and who ultimately became one of the most powerful officials of the regime under his father's tutelage.