John Hagel (or John Hagel III) is a management consultant and author.
Hagel has spent over 40 years in Silicon Valley. He is the founder of two technology startups and served as the Senior Vice President for Strategic Planning at Atari, Inc. He spent 16 years at McKinsey & Company, where he helped open their Silicon Valley office. Served as a leader of their strategy practice also he founded their e-commerce practice in 1993. Hagel has also been a consultant at Boston Consulting Group.
In 2007, Hagel founded the Deloitte Center for the Edge, a Silicon Valley-based research center. The Center for the Edge now has offices in Amsterdam and Melbourne.
Hagel is also involved with several other organizations, including the World Economic Forum, where he currently serves as co-chair of the Global Future Council on the Future of Platforms and Systems. He is also on the Board of Trustees of the Santa Fe Institute, an organization that conducts research on complex adaptive systems, and Independent Institute. Additionally, he hosts executive roundtables at the Aspen Institute.
He is credited with inventing the term "infomediary" in his book, ''NetWorth'', co-authored with Marc Singer, and published by the Harvard Business School Press in 1999.