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DCOS Support


Major General Seán Clancy is the Deputy Chief of Staff (Support) with effect from 3rd April 2019.

Major General Seán Clancy joined the Irish Defence Forces in 1984 as a cadet and commenced his flight training in 1986. He has flown both fixed and rotary wing aircraft and has accumulated nearly 5,000 flight hours. He is a qualified type and instrument-rating examiner, a qualified flight simulator instructor and has most recently held type, instrument and NVG ratings on the AW139.

Military Experience

He has served in appointments including Squadron Commander, Wing Commander, Senior Staff Officer Operations, Senior Staff Officer Personnel and Chief of Air Staff Support in Air Corps Headquarters. Prior to promotion he has served as Director of Strategic Planning Branch on the Chief of Defence’s Staff, Defence Headquarters.

Major General Seán Clancy has spent a considerable period of his career as a Search and Rescue pilot and was the commander of the crew who received the Marine Medal for Meritorious Service in 2002.

Overseas Experience

He has served for a year with the European Union Force in Bosnia as the military advisor to the Force Commander and spent two years as a non-permanent member of SHIRBRIG, the UN standby Brigade.


He holds a Bachelor of Science Degree from Trinity College, Dublin and a Masters in Military Leadership and Defence Studies from the National University of Ireland, Maynooth. He is a graduate of the Defence Forces Command and Staff College where he was the recipient of the Lt Gen Tadgh O’Neill Award. In 2017 he completed a Level 9 Diploma in Advanced Management Performance with the Smurfit Business School.


Major General Seán Clancy is married to Caroline. They have three children Lauren, Ryan and Lilymai and live in Dublin.