Finucane practised as an architect until 1974 when she joined RTÉ as a continuity announcer, having been recruited by Eoghan Harris.

[6][7] Her television work included information programming on RTÉ such as Consumer Choice and the Garda investigation programme Crimeline.

In June 2005 she was replaced in her radio timeslot by Ryan Tubridy; in turn she took over morning slots on Saturday and Sunday.

[10] Finucane suffered from heart arrhythmia which did not respond to treatment; John Clarke stated after her death that "I believe for two years that she had been very unwell", noting "she wouldn't go to doctors".

In one case, Finucane convinced one of her sisters to mimic her symptoms to a doctor in order to obtain a diagnosis.

[11] After a long flight from India where she had attended a friend's wedding, Finucane reported feeling very unwell upon arriving at her home in Naas, County Kildare, and decided to go to bed; she died unexpectedly in her sleep from pneumonia on 2 January 2020, aged 69.