The officer in charge of serious and organised crime has been appointed Deputy Commissioner, the second highest position in An Garda Síochána.
The Government announced the appointment of Assistant Commissioner Justin Kelly this afternoon.
The position had been vacant since March. It follows an open competition conducted by the Public Appointments Service.
The Government had to readvertise for the position after it was unable to fill the role last year.
In a statement, Minister for Justice Helen McEntee said: "Justin's career is marked by achievement and results and I know he will bring his experience, skill and huge personal commitment to An Garda Síochána’s mission, to this important senior position.
"This role is crucial to the effective day to day management and strategic direction of An Garda Síochána as well as supporting the Garda Commissioner in leading the implementation of the organisation’s ongoing programme of reform."
Garda Commissioner Drew Harris said Mr Kelly "brings huge policing experience and knowledge of An Garda Síochána to the role".
"He has very significant experience across a range of key leadership roles, notably leading on our fights against drugs and organised crime, economic and cyber-crime and immigration enforcement since his appointment as Assistant Commissioner in 2022."
"A key member of the Senior Leadership Team of An Garda Síochána, his positive and visible leadership has earned him the respect of colleagues across the organisation.
"I look forward to working with Justin as we continue to deliver a policing service that keeps people safe through a strong bond between An Garda Síochána and the community," Mr Harris added.