Zack Exley served as a senior adviser on the 2016 Bernie Sanders presidential campaign. He was a union organizer before becoming MoveOn.org’s first organizing director in its campaign to prevent the war in Iraq in 2003. As an early adviser to the Howard Dean presidential campaign, he then served as John Kerry’s director of online fundraising and communications in the 2004 general election. Subsequently, Zack worked as a consultant to global NGOs, campaigns and companies, and served as Wikipedia’s chief community officer and chief revenue officer. He is a cofounder and the executive director of New Consensus.