William Foster

William Foster is a partner in Bridgespan’s Boston office and the firm’s incoming managing partner. He was formerly the head of the organization’s US Advisory unit, and is an active thought leader on issues of philanthropy and social change.

Since joining the firm in 2002, William has supported the success of some of the sector’s most innovative philanthropies (e.g., Blue Meridian Partners, Co-Impact, TED) and some of the highest impact nonprofits (e.g., Youth Villages and Anti-Defamation League). He has a particular focus on the diligence, structuring, and supports required for philanthropic “Big Bets” and strong funding models for nonprofits. William has helped his foundation clients and a number of individual donors to craft some of the largest gifts in the sector.