Général d'armée aérienne Denis Mercier (born 4 October 1959) is a former Chief of Staff of the French Air Force.

He also acted as liaison officer for the CJTF HQ COMSTRIKFLTLANT (Commander Striking Fleet Atlantic) stationed in Norfolk.

From 2004 to 2008 he was assigned to the French Air Force headquarters in Paris, as the head of the plans division and was nominated as a flag officer in 2007 as Acting Chief of Staff (ACOS) for budget and performance.

He then commanded the French Air Force Academy in Salon-de-Provence, where he was a transformative leader, fostering enduring partnerships with allies and prestigious universities.

He was confirmed by the North Atlantic Council as Supreme Allied Commander Transformation on 23 March 2015, date on which he has been awarded the rank of Grand Officer of the French Legion of Honor.