99. Blackwell Consulting Services

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Founded by Robert Blackwell Sr. in 1992, Blackwell Consulting Services is the eighth largest black-owned company in Illinois. Blackwell Consulting is a full-service information-consulting firm serving Global 1000 and middle market enterprises. The Chicago-based company helps businesses grow by using innovative information technology solutions.

Corporate partners include IBM, Microsoft, Cisco Systems, and Lotus among others.  In 2008, the company earned revenues of $33.1 million.