81. Unibar Maintenance Services Inc.

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Founded in 1985, Unibar Maintenance Services Inc. is one of the nation’s leading black-owned utility services companies.

Unibar Maintenance specializes in contract meter reading  and janitorial services.  The Ann Arbor–based company provides routine cleaning, landscaping, pest control, tile and grout restoration,  as well as gas, water and electric meter reading services  in the U.S. and Canada.

In 2008, the company grossed sales of  $50 million–up 5.6% from the previous year.