In 1992 he was appointed commander of the National Gendarmerie Intervention Group (GIGN). In 1994 he was promoted to chef d'escadron (major). In 1994 he commanded the assault against the terrorists who had taken the passengers of Air France Flight 8969 hostage.
In 2007, after various positions in the Gendarmerie, he was again appointed commander of the GIGN, which underwent restructuring. In 2008 he joined the French forces leading the assault on the pirates who had captured the ship Ponant near Somalia.
On January 9, 2015, he led the operation to arrest Chérif and Saïd Kouachi following a hostage situation at a printing company in the town of Dammartin-en-Goële. The Kouachi brothers were suspected of being the perpetrators of the shooting at a Paris newspaper Charlie Hebdo on January 7, 2015.
- Presidential decree of July 1st, 1994, promoting Denis Favier to chef d'escadron
- Presidential decree of April 14, 2008, promoting Denis Favier to general
- Presidential decree of April 11, 2013, appointing Denis Davier as General-Director of the French Gendarmerie
|Wikimedia Commons has media related to Denis Favier.|