Cardiff Blues have confirmed chief executive Robert Norster is to leave the region.
Former Wales lock Norster was appointed Cardiff RFC chief executive in 2001 and continued as Blues chief following the advent of regional rugby in 2003.
Norster, who toured with the British Lions in 1983 and 1989, said he felt the time was right to move on.
"It has been an absolute privilege to have led the Blues since its inception," he said.
"Following considerable deliberation since the summer period, I now believe it is an appropriate time for a successor to carry forward the colours and build on the success of recent years."
Norster won 37 caps for Wales between 1982 and 1989 and later managed the national side.
During his time as Blues chief executive the region moved from their traditional Arms Park home to the new Cardiff City Stadium in 2009.
Norster is the second high-profile figure to leave the Blues during recent months following coach Dai Young's departure to London Wasps.
The 54-year-old will leave his role during the coming months and Blues chairman Peter Thomas said Norster had been central to the region's development since their formation.
"Bob has been at the core of our organisation throughout the many challenges and successes of our region," said Thomas.
"I know Bob has given great thought and reflection since the summer before making this conclusion and consequently I accept the difficult decision he has made.
"We will now likewise take our time to ensure we move forward in a considered fashion and in doing so look to build on the strong platform established by Bob and the wider team over the recent past."
The announcement Norster is to leave his role as Blues' chief executive comes two days after Cardiff City football club announced chief executive Gethin Jenkins was leaving his position.