The pair replace and Peter Geikie-Cobb (pictured), who left the firm last month after more than a decade at the fund's helm.,
Bell and de Bruin will assume control of the mandate on 1 July and will be supported by a 14-strong team covering global rates, currency, macro and money markets and bond and FX dealing.
The fund's absolute return focus and investment strategy will remain the same under the new team, which has combined 65 years' experience.
F&C Investments head of consumer Rob Thorpe said in a statement: 'This is a pivotal time for fixed income markets. The unwinding of central bank measures, including quantitative easing and record low interest rates, will provide exciting opportunities for active management within the asset class.
'Steven and Michiel are highly experienced in global macro rates and currency markets, including absolute return risk-focused strategies. Liquid absolute return strategies are a core competence within our 45-strong fixed income team at F&C.
The £350 million Global Macro Bond fund has struggled of late, losing 4.3% in the three-years to the end of April leaving it languishing in 81st place in the 84-strong peer group.