Wayne DeVeydt, a healthcare veteran who most recently worked at Bain Capital, will take up the finance chief job on Sept. 2 as the healthcare behemoth faces an array of operational challenges.

UnitedHealth 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.

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,