John Treacy is set to bring an end to his time as Chief Executive of Sport Ireland.
The 64-year-old will retire at the end of this year.
An Olympic silver medallist from the 1984 Games - when he finished second in the marathon - Treacy has been in the role since Sport Ireland was established in 2015.
Prior to that, he was Chief Executive of the Irish Sports Council for 16 years.
His period as CEO included the introduced of the Sport Ireland Institute, which has provided support services to high-performance athletes and coaches.
"It has been a privilege to lead Sport Ireland and the Irish Sports Council throughout a period of significant progress for Irish Sport," Treacy said.
"There have been many highlights, but in particular I am delighted with the significant strides made in women’s participation in sport and disability sport over recent years.
"While it was my intention to retire from the role last year, the postponement of the Olympic & Paralympic Games, the onset of the pandemic and the need to ensure stability changed those plans. With Sport Ireland now firmly established and the sector in a strong position to tackle any challenges ahead, I believe now is the right time for me to step away.
Paying tribute to Treacy, Chair of Sport Ireland Kieran Mulvey said he had been a major asset to Irish sport.
“John Treacy has been a model Chief Executive that has led Irish Sport through action and strategic vision.
"The sport sector in Ireland is in a very strong position thanks to the leadership that John has demonstrated since taking on the role with the Irish Sports Council in 1999.
"His contribution to sport in Ireland both as an athlete and as a chief executive is immeasurable.”
As Treacy's departure looms in two months, Sport Ireland have already commenced the search for a successor.