Alison Swonnell was named global head of institutional marketing at Fidelity International, confirmed a spokeswoman for the firm.
The position is new, and Ms. Swonnell is based in London. She reports to Chuck McKenzie, global head of institutional.
Fidelity International has £239.3 billion ($324.5 billion) in assets under management.
Ms. Swonnell was director of fund operations for alternative money manager LCM Partners. A spokesman confirmed her departure and said a replacement will be announced in due course.