Paetec Holding Corp.

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Algimantas K. Chesonis has served as Senior Vice President, Chief Accounting Officer and Controller of PAETEC Holding since March 2007. Mr. Chesonis has served as Senior Vice President and Controller of PAETEC Corp. and PaeTec Communications, Inc. since August 2004 and as Vice President of Finance and Controller of PaeTec Communications from July 1998 to August 2004. In his capacity as Senior Vice President and Controller, Mr. Chesonis has been responsible for all aspects of accounting and financial reporting. Mr. Chesonis previously served as Director of Public Reporting for US Foodservice, Inc. and Audit Manager for PriceWaterhouse, LLP.

Edward J. Butler, Jr. serves PAETEC as Chief Operating Officer. In this capacity, Mr. Butler oversees PAETEC's Sales and Marketing, Operations, Network Engineering, and Service Delivery divisions, and as such, is responsible for the performance, growth, and optimization strategy of the company's service delivery infrastructure. Mr. Butler joined PAETEC Communications as a member of the founding officer team in 1998, and possesses more than 25 years of experience in the telecommunications industry. Prior to joining PAETEC, Mr. Butler served ACC Communications for more than a decade in a number of executive and managerial positions. Mr. Butler serves on the Comptel Alliance CEO Council. Mr. Butler serves on the Board of Directors for Hospice Buffalo, is past Board Chairman for Compeer West, a not-for-profit United Way mentoring agency in Western New York, and founded and serves as Director of the Edward Butler Family Foundation.

Robert D. Moore, Jr. has served as the Senior Vice President and Chief Information Officer of PAETEC Holding since February 2007. Mr. Moore has served in those positions with PaeTec Communications, Inc. since December 2005. Before assuming his current position with PAETEC Holding, Mr. Moore served as Senior Vice President-Information Technology from August 2004 and, beginning in 1998, in various other roles with PaeTec Communications. In his capacity as Senior Vice President and Chief Information Officer, Mr. Moore has been responsible for overseeing operating support systems, systems operations and engineering, and applications development and deployment. Mr. Moore possesses more than 14 years of experience in the telecommunications industry and was employed by ACC Communications before joining PaeTec Communications.

Charles E. Sieving , age 34, has served as Executive Vice President, General Counsel and Secretary of PAETEC Holding since February 2007. Mr. Sieving was associated with Hogan & Hartson L.L.P., an international law firm, from October 1998 to February 2007 and served as a partner of that firm from January 2005 to February 2007.

H. Russell Frisby, Jr. has served as a director of PAETEC Holding since February 2007 and as a director of PAETEC Corp. since January 2007. Mr. Frisby has been the partner-in-charge of the Telecom Group of Fleischman and Walsh, L.L.P., a law firm, since March 2006, when he joined the firm. Mr. Frisby s legal practice focuses on regulatory and corporate matters affecting entities in the communications, energy and technology areas, and for over 20 years he has represented clients in a wide variety of proceedings before the FCC, state utility commissions and federal courts. Before joining Fleischman and Walsh, Mr. Frisby was a partner with Kirkpatrick & Lockhart Nicholson Graham LLP, a law firm, beginning in April 2005. From February 1998 to March 2005, Mr. Frisby was the President, Chief Executive Officer and Acting Chief Legal Officer of the Competitive Telecommunications Association (CompTel) and, before his service in that position, served as Chairman of the Maryland Public Service Commission. Mr. Frisby holds a B.A. degree from Swarthmore College and a J.D. degree from Yale Law School.

Michael C. Mac Donald is senior vice president, operational effectiveness for Xerox Corporation. He was named to this position in September 2008 and leads the integration of Xerox Mortgage Services and Xerox Litigation Services with other units of the company. Mac Donald is a senior vice president of the corporation, appointed in July 2000. He was previously president of Xerox Marketing Operations, responsible for corporate marketing, xerox.com, advertising, brand, public relations, and corporate communications. Mac Donald joined Xerox in 1977 as a field sales representative and has held several senior positions in sales, marketing and general management. He was president, Marketing & Global Accounts from 2004 - 2007. Prior to that, he was president, North American Solutions Group, responsible for all products, services and solutions sold by the Xerox direct sales force in the United States and Canada. He has also served as that group's senior vice president of marketing and chief of staff. After receiving a bachelor's degree in political science from Rutgers University in 1975, Mac Donald attended Iona College's John C. Hagen Graduate School of Business. He completed executive business and management programs at Columbia University and Harvard in 1992 and 1998, respectively. Mac Donald is a board director of Medifast, PAETEC, and the Jimmy V Foundation.

Mr. Aab co-founded US LEC in June 1996 and has served as Chairman of the Board until joining PAETEC's Board in February 2007 as Vice Chairman. He also served as Chief Executive Officer from June 1996 until July 1999. Between 1982 and 1997, Mr. Aab held various positions with ACC Corp., an international telecommunications company in Rochester, NY, including Chairman and Chief Executive Officer, and served as a director. Mr. Aab is a member of the Board of Trustees of the University of Rochester, the University of Rochester Medical Center, Rochester Institute of Technology and various private corporate institutions.

Mr. Ganatra co-founded US LEC in June 1996 and has served as a director until joining PAETEC's Board in February, 2007. He served as Chief Executive Officer and Vice Chairman of the Board of Directors from July 1999 until his retirement in December 2001. He also served as President and Chief Operating Officer from June 1996 until July 1999. From 1987 to 1997, Mr. Ganatra held various positions with ACC Corp., including serving as its President and Chief Operating Officer. Prior to joining ACC Corp., Mr. Ganatra held various positions during a 19-year career with Rochester Telephone Corp., culminating with the position of Director of Network Engineering.