This Department only holds data in relation to the civil service, data in respect of the public service would require individual requests to each Department and public service body.
In the civil service over the period 2012-2017 there were 5,412 retirements for a variety of reasons including normal age retirement, ill health and voluntary early retirement.
The data available doesn't specifically identify redundancies (as opposed to resignations or contract expiration) but redundancies are not considered to be a feature of civil service employment.
It is important to understand that retirements and other exits from public service employment represent normal job churn below the line. Above the line recruitment of additional public servants, particularly in Health and Education, has been the primary driver of increases in the public service pay bill over the last five years. Between Q1 2012 and Q3 2017 over 22,500 additional public servants have been added to public service.
Full facts and figures can be found on the public service databank: http://databank.per.gov.ie/Public_Service_Numbers.aspx?rep=VG.