In 1995, Ilgar Mirzayev began his service with the rank of lieutenant. From 2003 to 2005, he improved his education at the War College of the Azerbaijani Armed Forces. Mirzayev had served in Baku, Ganja, Nakhchivan, Beylagan, Goranboy, and Shamkir in different years. He served on the frontline during the April 2016 clashes. On 23 February 2019, he was appointed Chief of Artillery of the 3rd Army Corps.