EXHIBIT 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement No. 333-31965 on Form S-8 of Diamond Management & Technology Consultants, Inc., of our report dated June 21, 2007, appearing in this Annual Report on Form 11-K of the Diamond 401(k) Plan (formerly known as DiamondCluster International, Inc. 401(k) Plan) for the year ended December 31, 2006.

/s/ Crowe Chizek and Company LLC

Oak Brook, Illinois
June 21, 2007