The chief regulatory and risk officer of the Singapore Exchange (SGX) will retire at the end of this year but continue as a special adviser.
Ms Yeo Lian Sim, 64, has had an eventful career with the SGX, including dealing with various regulatory issues from the S-chip scandals to the recent penny stock crash.
Under her charge, the SGX introduced several changes to the listing rules.
Ms Yeo, who took up the position in 2004, was previously Temasek Holdings' managing director for capital resource management.
Before that, she was deputy managing director at the Monetary Authority of Singapore and head of its market conduct group.
SGX chief executive Magnus Bocker said in a statement on Monday: "Lian Sim has built SGX's risk management and regulatory function into a well-respected, professional organisation with a worldwide reputation for expertise and execution.
"She has been tireless in her pursuit of regulating a fair, orderly and transparent marketplace."
Mr Bocker also sent her best wishes for a "long and happy retirement" on behalf of the bourse.
Ms Yeo will be replaced by Mr Richard Teng, 43, as chief regulatory officer.
Mr Teng has been the deputy chief regulatory officer since Jan 1 last year. Before that, he was the head of issuer regulation and enforcement and market surveillance.
Ms Agnes Siew-Koh, 50, will lead the risk management team as the chief risk officer. She has been the head of clearing risk since July 1, 2010, and was previously the senior vice- president of risk management.
Both will start in their new positions from Jan 1.
Get a copy of The Straits Times or go to straitstimes.com for more stories.