Brigadier General Murphy (Ret.) served 43 years as an infantry officer in the Irish Defence Forces until his retirement in January 2012. He has held positions of General Officer Commanding & Brigade Commander 2nd Eastern Brigade – Senior Operational Commander, Director of Intelligence, and Senior Staff Officer at Defence Forces Headquarters at Dublin.
In his overseas service Brigadier General Murphy Seconded to General Secretariat of the EU as a member of the EU Military Staff with special responsibility for the Middle East region and Transnational Terrorism from 2001 – 2004, and he has served as a member of the International Conference on Former Yugoslavia (ICFY) – joint EU & UN monitoring mission covering the Balkans in 1995-96. In addition he has completed four tours of duty with the United Nations in the Middle East serving in command and senior staff appointments at Force HQ level.