[1] After having spent his early career serving in the Parlement and chancelleries of the royal family he was elevated to the prestigious role of Chancellor of France upon the disgrace of Guillaume Poyet.

In this role he worked closely with the kings on royal policy, serving as a member of the conseil des affaires under both François I and Henri II.

Olivier was summoned to resume the full chancellorship of France and found himself central once more to the administration of the young king.

[5] In his role as a chancellor for the duchy of Alençon he oversaw Jeanne d'Albret's compliance with the Treaty of Crépy.

[7] With Henri heading to Italy shortly after his ascension Catherine de Medici was granted the regency in his absence.

[8] In 1549, a report was prepared by Jean du Tillet for Henri II, outlining the jurisdiction of the Parlements in a way advantageous for royal authority.

[14] Quickly into the new reign Olivier would find himself visiting the king every morning alongside Catherine and the Guise, counselling him on the business of the day.

[17] Olivier was in support of a change of royal policy towards Protestants in the wake of the attempt, championing the Edict of Amboise.