Fidelity Investments Australia managing director Michael Ohlsson is leaving the American giant after three years at the helm.
Ohlsson, who joined Fidelity in July 2004, will remain in his position until October.
In an announcement to stakeholders Ohlsson said he was leaving the business in "excellent" shape.
"We are continuing to build our Australian business with our commitment to this market only setting to increase," he said.
Ohlsson, who has more than 24 years in the Australian investment industry, was responsible for providing overall strategic direction to Fidelity's business in Australia.
According to Standard and Poor's fund analyst Marcus Hanel, Ohlsson's departure will not affect the investment team.
"His departure will make no material difference to the underlying investment process of the group's Australian products," Hanel said
According to investor supermarket, Fidelity currently has $2.35 billion in Australian funds under management, across global equities and Australian equities.
In June, Fidelity senior research relations manager Oliver Trusler left to take up a position at Schroders.
Ohlsson joined Fidelity after nine years as Barclays Global Investors director of adviser services and institutional business.