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Mr. Mac Donald served as a director of US LEC from April 2003 until joining PAETEC's Board. Since joining Xerox Corporation in 1977, Mr. Mac Donald has held various sales and marketing positions with the company. Since October 2004, he has been president of Global Accounts and Marketing Operations, which is responsible for directing the company's largest global accounts, improving the customer experience, corporate marketing, Xerox.com, advertising, worldwide public relations and marketing communications. Mr. Mac Donald is a director of Medifast, Inc. which is engaged in the production, distribution, and sale of weight products. He is also on the Board of Directors of the Rochester Institute of Technology, the U.S. Chamber of Commerce, the Jimmy V Foundation, and the board of overseers of Rutgers University. In addition, he is also a board member of the CMO Council North American Advisory Board. | 