The Policing Authority is to begin looking for a new Garda Commissioner today.
Noirin O'Sullivan announced her shock retirement yesterday - amidst a number of controversies in the force, including the breath test and whistleblower scandals.
In a statement, Mrs O'Sullivan suggested that "responding to an unending cycle of requests, questions, instructions and public hearings" had gotten in the way of her efforts to reform the force.
Taoiseach Leo Varadkar echoed Mrs O'Sullivan's statement, saying the decision was made "in the best interests of An Garda Siochana".
Opposition parties, meanwhile, have welcomed the news.
Fianna Fáil said it "paves the way for a new chapter for An Garda Síochána", while Sinn Féin Deputy Leader Mary Lou McDonald suggested it had been clear "for some time now that Commissioner O’Sullivan’s position was untenable".
Labour Party Leader Brendan Howlin says the force needs new leadership: