Primary Job Title Board of Directors Primary Organization 
General Electric
Gender Male
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Brennan is a graduate of Dartmouth College and earned an MBA from Harvard Business School. He joined Vanguard in 1982, was elected chief financial officer in 1985, president in 1989, and served as chief executive officer from 1996 to 2008 and chairman from 1998 through 2009.
He has been chairman emeritus and senior advisor to Vanguard since
2010. Brennan is a director of Guardian Life Insurance Company of America and LPL Financial Holdings Inc., and lead governor of the FINRA Board of Governors.
He is a trustee of The Vanguard Charitable Endowment Program and the University of Notre Dame and served as chairman of the Financial Accounting Foundation. Brennan also served as a director at The Hanover Insurance Group during the last five years.
