Born in Lecce on 11 August 1961, General Miglietta attended both the Military School "Nunziatella" and the Military Academy from 1977 to 1980, commissioning as a Cavalry Officer. From 1982 to 1984, he attended the Turin Junior Officer School. From 1985 to 1992, he served at the Cavalry Regiment "Nizza (1°)" as Platoon Leader, Squadron Commander and Chief of Operations. From 1992 to 1997, he was Chief of the Officer Cadets’ Section at the Junior Army Officers School, and served as both Tutor and Professor at the Joint Command and Staff College. As a Staff Officer, he served as Deputy Director of the Italian Army Public Information Agency (1998-1999), Head of the Public Information Office (2000-2004) and Head of Office of the Deputy Chief of the General Staff (2006-2008).
As Senior Officer, he commanded the "Savoia Cavalleria (3°)" Squadron Group (1999-2000) and the "Lancieri di Montebello (8°)" Regiment (2005-2006). As a General Officer, he commanded the Cavalry Brigade (2010-11) and the Italian Joint Force Headquarters (2011-12). From 2012 to 2015, he was Deputy Director and, thereafter, Director of the General and Financial Planning Department at the Army General Staff.
From 2016 to 2019, he was Head of the General Office of Budget and Planning at the Defence General Staff. In 2019, he was appointed Deputy Commander of the Operational Land Forces Command and Army Operational Command. From 2019 to 2022, he was Commander of the NATO Rapid Deployable Corps – Italy.
During his career, he has deployed on active service as Joint Task Force Commander "Pellicano" Operation in Albania, "Joint Guardian" in Kosovo, "Leonte" in Lebanon and as Commander "KFOR" in Kosovo (2015 - 16).
As well as attending the Joint Command and Staff College Course at the Joint Command and Staff College in Rome, Gen Miglietta also attended the US Army War College in Pennsylvania and the Royal College of Defence Studies in Great Britain.
General Miglietta is a qualified journalist, graduating in Strategic Sciences and International and Diplomatic Sciences. He obtained the second level Masters in Strategic Sciences and a further Masters in Strategic Studies at the U.S. Army War College. He attended the Postgraduate Course in Public and Institutional Communication and Public Information and the Post-conflict Rebuilding Management Senior Course.
Since 1992, he has been married to Laura.