An Post is to seek up to 300 voluntary redundancies in a cost-cutting plan that may also see it move its headquarters from Dublin's historic GPO.
The organisation said its voluntary severance programme will be open to 1,200 of its corporate and support office workers, around 950 of whom are currently based in the GPO.
An Post said that a recent change in work practices identified more than 250 roles that could be eliminated.
As part of the change, the organisation will also consider the potential refurbishment of its GPO offices, as well as investigating if a move to another location may be more appropriate.
However, An Post said that no matter what decision was made it would continue to operate a post office at the city centre location.
Its parcel hall and Witness History Visitor Centre will likely remain as well.