RTÉ's Chief Financial Officer Richard Collins has resigned from his position.
The broadcaster's Director-General Kevin Bakhurst confirmed the news to staff earlier on Wednesday.
Mr Bakhurst said RTÉ is in the process of identifying a replacement CFO.
"Richard will assist in in any ongoing processes to the extent that this may be required," he said.
"We wish to thank Richard for his hard work and contribution to RTÉ over the past three years and to wish him every success in the future," a short statement added.
Mr Bakhurst also held a meeting with RTÉ staff today to update them on developments at the organisation.
RTÉ has been hit with a sharp fall in TV licence fee revenue following revelations of secret payments to former presenter Ryan Tubridy.
Mr Collins was one of several RTÉ executives questioned at an Oireachtas committee hearing in June following the revelations.
When asked what his salary was by TDs, Mr Collins replied: "I don't know what my exact salary is off top of my head".
He subsequently clarified that he 'believed' he was paid a base salary of around €200,000, plus a car allowance of €25,000.