Sara Devereux was named global head of fixed income at Vanguard Group, spokesman Freddy Martino confirmed in an email.
Effective June 30, she will replace John Hollyer, who will retire.
Ms. Devereux will oversee the firm's $2 trillion fixed-income group. She will report to Greg Davis, Vanguard's chief investment officer.
Ms. Devereux is global head of rates at Vanguard. Vanguard plans to announce a replacement soon, Mr. Martino said.
Vanguard managed $7.5 trillion in global assets as of March 31.