John McCartney, 58, has been Chairman of Huron Consulting Group Inc., a healthcare and educational consulting company since May 2, 2010. Mr. McCartney served as Chairman of A.M. Castle & Co., a specialty metals and plastics distributor from May 2007 to May 2010 and remains on its Board of Directors. Mr. McCartney served as the Chairman of Westcon Group, Inc., a specialty distributor of networking and communications equipment until March 2009 and remains on its Board of Directors. Mr. McCartney was the Vice-Chairman of Datatec Limited, a technology holding company, from 1998 to 2004 and currently serves on its Board of Directors. Mr. McCartney was formerly President and Chief Operating Officer of U.S. Robotics. Mr. McCartney also served on the Board of Federal Signal Corporation, an environmental, safety and transportation solutions company, until April 24, 2010. Mr. McCartney has been a member of the Covance Board since May 2009.