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McGuinness earned a bachelor's degree in political science from George Mason University as well as a master's in legislative affairs from George Washington University. He is expected to join the Chattanooga-based company later this month, according to the news provider.
"I'm thrilled to have the opportunity to join this industry-leading company," McGuinness said in a statement. "Federal legislation and regulation continue to have an increasing role in financial services, and I'm looking forward to helping Unum engage in Washington in a positive and productive way."
According to the company's Web site, Unum is one of the "world's leading benefits providers" and offers disability, long-term care, and life and voluntary insurance products.