UnitedHealth Group announced yet another major executive move this week, with Chief Financial Officer John Rex set to step down next month. | UnitedHealth Group announced yet another major executive move this week,

UnitedHealth Group said on Thursday it will replace its finance chief John Rex with an external hire, Wayne DeVeydt, adding to the management changes at the health insurer that has been struggling to control its medical costs.

Wayne DeVeydt, 55, will take over as UnitedHealth CFO on Sept. 2, the company said, replacing John Rex, who had served in the job since 2016. Rex, 63, will become a strategic adviser to UnitedHealth CEO Stephen Hemsley at that time.