Paul Flynn is to step down from his role as chief executive with the Gaelic Players Association.
It’s a role the former Dublin footballer has occupied since 2018.
GPA members were informed of Flynn’s decision this afternoon.
It's believed the six-time All Ireland-winner is leaving to pursue other business opportunities.
He'll remain on for a number of months as the National Executive Committee considers a replacement.
"I would like to thank the players, the internal team, the NEC and the board for always backing me through this thoroughly enjoyable tenure as GPA CEO," Flynn said.
"I would also like to thank the GAA, Sport Ireland, the Government, our partners in the US and Ireland for their continued support throughout my term.
"I am very proud of what we have achieved together as a team, and I look forward to seeing the newly combined players association grow and develop into the future."
Flynn made the step up from the GPA's National Executive Committee in 2018, succeeding Dermot Earley as chief executive.
In recent months, the Fingallians clubman has overseen the impending merger of the GPA and the Women's GPA.
Flynn told OTB Sports last year that one of his greatest tasks as chief executive was tackling misconceptions regarding the players' union.
"Some of the things we aim to achieve may not appease everyone," he told OTB AM, "[but] we have to just be happy in the fact that we are representing our core membership, the inter-county players.
"That's always going to create some level of, conflict is a bit strong, but we're not always going to be in agreement with everybody's views of the world.
"What sometimes gets lost in it is all inter-county players are club players too. They're all delighted to be back with their clubs training hard... it's excellent. But equally they want to get back into that high-performance environment.
"We're the representative body of the inter-county players. Everybody loves the inter-county players, but they hate the GPA. Or misunderstand the GPA.
"So it's important that we continue to get our message out there."