Braemar Shipping Services chief executive James Kidwell is retiring after 17 years at the London broker.
The company said Kidwell's last day will be 27 July.
Braemar's divisional CEOs will report directly to chairman Ron Series, who will become executive chairman on an interim basis.
Series said: "James joined Braemar in 2002 and spent a decade as group finance director before becoming chief executive in 2012.
