[2] For many years he served as the company's president alongside John C. Bogle who was Vanguard's founder and CEO.
When Bogle stepped down from his chairmanship in 1996, Brennan was his hand-picked successor.
[2] He has chaired the Board of Trustees of the University of Notre Dame.
[4] He was an independent director of General Electric[5] and was also the chairman of FINRA (Financial Industry Regulatory Authority).
[2] Brennan grew up in Winchester, Massachusetts, and attended Dartmouth College where he was a member of Sigma Nu fraternity.