Interviews for the job of Chief Constable of the Police Service of Northern Ireland are taking place today.
Four candidates have been short-listed for the role currently held by George Hamilton, who is due to retire.
The 51-year-old has been Chief Constable of the PSNI since 2014.
He was offered a two-year extension but opted to retire. He has been a police officer for 34 years.
Two applicants from within the PSNI and two outside candidates have been shortlisted for the vacancy.
Stephen Martin is currently the PSNI's No. 2 - the Deputy Chief Constable. Mark Hamilton is an Assistant Chief Constable.
Jon Boucher is the outgoing Chief Constable of Bedfordshire Police. He is currently leading the investigation into the British Army's alleged agent within the IRA, the Stakeknife affair linked to Freddie Scappaticci.
Simon Byrne is a former Chief Constable of Cheshire Police.
A sub-group of political and independent members from Northern Ireland's Policing Board will carry out the interviews.
Mr Hamilton came from within the PSNI, while his predecessors, Matt Baggott and Hugh Orde, were outside appointments.
In the absence of a Northern Ireland power-sharing executive, it will fall to Northern Ireland secretary Karen Bradley to accept or rejection the interview board's recommendation.