David F. Walker has been a director since 2005 and is currently the Director of the Accountancy Program at the University of South Florida in St. Petersburg and leads the school's Program for Social Responsibility and Corporate Governance. He has held these positions since 2002. Mr. Walker also has been an independent consultant with respect to accounting, auditing and business issues since 2002. For approximately 27 years, through 2002, Mr. Walker was with the accounting firm of Arthur Andersen LLP, having served as a.