Diamond Management & Technology Consultants was an independent management consulting firm founded in 1994, headquartered in Chicago, Illinois with satellite offices in Hartford, Connecticut, New York City, Washington DC, London, and Mumbai.

The industry segments under which Diamond operated include consumer packaged goods, financial services, and health care, among numerous others.

[3] In 2006, the company was again renamed, this time to Diamond Management & Technology Consultants, Inc. as it divested portions of its international operations.

Diamond had, throughout its history, well-defined relationships with major technology pioneers such as Alan Kay, a member of the board of directors, as well as John Perry Barlow, Gordon Bell, David P. Reed, Dan Ariely, Matthew Peterson and Dan Bricklin, all regular faculty members of the privately branded industry conference called Diamond Exchange.

[1] Diamond now operates as a homogeneous component of PwC's Advisory Services.