After completing his
Leaving Certificate in 1965 Earley joined the
Defence Forces as a cadet and was
commissioned in 1967. His first posting was as a platoon commander in the Recruit Training Depot at the
Curragh and in 1969 he was appointed an instructor at the Army School of Physical Culture (ASPC). Two years later, in 1971, Earley obtained a specialist diploma in
physical education at St. Mary's College,
Twickenham. Earley's service record included overseas service with
UNTSO in 1975, Adjutant to the 52nd Infantry Battalion
UNIFIL. From 1987 to 1991, he served as deputy military adviser to UN secretary-general
Javier Pérez de Cuéllar and Battalion Commander of the 81st Infantry Battalion
UNIFIL in 1997. While serving with the UN up to 1991 he was a member of negotiating teams dealing with the
Iraqis and Kuwaitis, and was a key adviser during the setting up of the UN's mission in Kuwait – Unikom. He was involved in negotiating an end to the
Angolan civil war. His resignation was accepted on 9 June 2010 and one of his previous deputies, Major General
Sean McCann, was appointed Chief of Staff. Lt Gen Dermot Earley died of
Creutzfeldt–Jakob disease (CJD) on 23 June 2010 at the age of 62. His
Newbridge funeral on 24 June 2010 was attended by the
Taoiseach Brian Cowen, Irish government ministers and leading GAA figures, while former Taoiseach
Liam Cosgrave issued a statement calling him "one of the great figures of this country". ==Football career==