Mr. Roedel has served as a member of our board of directors and as chairman of our audit committee since October 2002 and currently serves as a member of our corporate governance and nominating committee. Mr. Roedel is a director, and chairman of the audit committee of Sealy Corporation and Luna Innovations Incorporated, and is a director and a member of the audit committee of IHS Inc. He is also a director of the Association of Audit Committee Members, Inc., a non-profit organization. Mr. Roedel was a director and chairman of the audit committee of Dade Behring Holdings, Inc. from October 2002 until November 2007 when Dade was acquired by Siemens AG. Mr. Roedel served in various capacities while with Take-Two Interactive Software, Inc. from April 2004 to June 2005, including as its chairman and chief executive officer. From 1999 to 2000, Mr. Roedel was chairman and chief executive officer of the accounting firm BDO Seidman LLP, the United States member firm of BDO International. Before becoming chairman and chief executive officer, he was the managing partner of BDO Seidman's New York metropolitan area from 1994 to 1999, the managing partner of its Chicago office from 1990 to 1994 and an audit partner from 1985 to 1990. Mr. Roedel is a certified public accountant. Incumbent Class I and Class III directors. The following two tables set forth similar information with respect to incumbent Class I and Class III directors who are not nominees for election at the annual meeting: