Covington, Kentucky, November 14-15, 2016— This month Pinnacle Group CEO and diversity advocate Nina Vaca spoke at the 27th annual Toyota Opportunity Exchange: Connecting Tier I & Tier II Suppliers conference.  As a minority business owner and advocate for supplier diversity, Nina Vaca addressed the power/advantages/business benefits of supplier diversity during the Diverse Business and Corporate Tier 1 Seminar. The …