It draws 1,500 people to Schaumburg every year, filling the Renaissance Hotel and spilling into other hotels, bringing local restaurants to life after the holidays, and drawing speakers like Bill Clinton, Colin Powell, Jack Welsh and George W. Bush. But you won’t find it on any tourism bureau list of events, or even on the Schaumburg Convention Center list of events. The CareerBuilder.com…

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Schaumburg conference brings in big names … secretly