Gregory Davis was named head of Vanguard's fixed-income group, confirmed company spokeswoman Emily White.
Mr. Davis will replace Robert F. Auwaerter, who plans to retire in March 2014.
Mr. Davis will be responsible for the portfolio management, strategy, credit research, trading and planning functions for the company's fixed-income group. He will continue to report directly to Vanguard's chief investment officer, Tim Buckley.
Mr. Davis will be based out of Vanguard's Valley Forge, Pa., headquarters.
Mr. Davis currently serves as chief investment officer of the Asia-Pacific region for Vanguard and is a director of Vanguard Investments Australia. A replacement for Mr. Davis in these roles has not yet been named.