Lieutenant General Ioannis Papanagnostou was born on 25 September 1963 in Halkis. He was admitted to the Hellenic Military Academy (Evelpidon) in 1982 and graduated in 1986 as Armour Second Lieutenant.
He completed all training courses provided for his rank at the Armour Officer School and in 1987 he was assigned as Platoon Leader at the Armour Training Centre in Avlonas, Attica.
From 1988 to 1990, he served as Platoon Leader and Tank Company Commander at the 211th Medium Tank Battalion and from 1994 to 1995 as Reconnaissance – Covering Company Commander at the 4th Reconnaissance Battalion.
In 1990, he attended the Helicopter Pilot Initial Training Course and, in 1997, the Helicopter – Aircraft Instructor Course.
From 1991 to 1998, he served as helicopter pilot and as Helicopter – Aircraft Company Commander at the 1st Army Aviation Helicopter Battalion.
In 1998, he was transferred from Armour to the Army Aviation.
In 1998, he was assigned as Headquarters Company Commander at the newly established 1st Army Aviation Brigade "KILKIS – LAHANA" until 1999.
In 1999, he attended the Army War College and in the summer of 2000, after his graduation, he was assigned to the 1st Army Aviation Brigade as Director, 3rd Staff Office.
In 2001, he studied at the Defence Staff Officers Interservice School.
In 2004, he was reassigned to the 1st Support Battalion as its Commander and, in 2005, to the 1st Army Aviation Helicopter Battalion as its Commander.
In 2007, he was reassigned to the Hellenic Army General Staff's Army Aviation Directorate as 3rd Office Director.
In 2009, he was assigned to the 1st Army Aviation Brigade "KILKIS – LAHANA" as Chief of Staff until 2011, when he attended the Hellenic National Defence College.
In 2012, he was reassigned to the Hellenic Army General Staff's Operations Division as Section Chief until 2013 and then as Deputy Director until 2015.
In 2015, he was assigned to the Higher Military Command of Interior and Islands "AEGEAS" as Director, A Branch (Operations).
In March 2016, he was promoted to Brigadier General and assigned to the 1st Army Aviation Brigade "KILKIS – LAHANA" as its Commanding General.
In March 2017, he was reassigned to the Hellenic National Defence General Staff as Director, Executive Office of the Deputy Chief.
In March 2019, he was promoted to Major General and assigned to the Hellenic First Army/EU-OHQ "AHILLEAS" as Deputy Commanding General.
In March 2020, he was reassigned to the Hellenic National Defence General Staff as Director, A Staff Directorate.
On 01 March 2021, he was promoted to Lieutenant General and, upon decision of the Governmental Council for Foreign Affairs and Defence, assumed his duties as HAGS Chief of Staff.
Lieutenant General Ioannis Papanagnostou has more than 2,500 flying hours piloting helicopters.
He is married to Vasiliki Nastou, counsellor of the Minister of Interior.
He has been awarded all Armed Forces medals and commendations provided for his rank.
Foreign languages: English.