The new Chief of Staff of the Defence Forces is Major General Conor O'Boyle.
Major General O'Boyle served with the Artillery Corps from 1972 and spent three-and-a-half years in the Middle East as part of United Nations missions observing truces and monitoring the Israeli withdrawal from Lebanon.
The married father-of-two was promoted to general in October 2009 and has commanded the 1st Southern Brigade in Cork and the Defence Forces Training Centre in the Curragh.
Major General O'Boyle succeeds Lieutenant General Sean McCann, who will retire on August 12.
Alan Shatter, Minister for Defence, said he was looking forward to working closely with him.
"I would like to take this opportunity to congratulate Major General Conor O'Boyle on his new appointment and wish him well in taking on the challenges that come with it," he said.
Mr Shatter said Lt Gen McCann served the Defence Forces and the country with distinction, leadership and professionalism both at home and abroad.
"I would also like to take this opportunity to thank Lieutenant General Sean McCann for his outstanding contribution as Chief of Staff over the last three years and for his lifetime dedication to the Defence Forces. On behalf of the Government, I would like to wish him well in his retirement and to thank him for his hard work and commitment over many years of service in the Defence Forces," he said.