Swimming Australia's chief executive Alex Baumman has quit the job for health reasons just three months into his tenure.
Baumann, appointed to the role in May this year, says recent undisclosed health issues prompted his decision.
"As a two-time cancer survivor, I appreciate how important health and family are," he said in a statement on Monday.
"I recognise the timing is difficult but I know I must take this time for myself and my family now."
Baumann, a dual Olympic swimming gold medallist for Canada, had been performing a review of SA's operations amid a culture controversy that flared during the lead-in to the Tokyo Games.
SA has also formed an independent panel to investigate claims of bullying and abuse of swimmers.
SA president Kieren Perkins said an interim chief executive would be appointed as soon as possible.
"Our next CEO will be tasked with leading Swimming Australia into the new era of swimming, with a focus on safe, elite performance and community engagement as we turn our attention to Paris 2024," Perkins said in a statement.
"We're sad to see Alex go. This is a great loss for our sport, but we understand his reasons."
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