Mr. Robison has served as our Chairman, President and Chief Executive Officer since 1997. Prior to joining us, Mr. Robison was an Executive Vice President, Chief Operating Officer and a director of General Medical Corporation. Mr. Robison holds a B.B.A. from the University of Texas and an M.A. from the University of Texas-Dallas.

Mr. Lacey has served as our Senior Vice President and Chief Financial Officer since 2003. Prior to joining us, Mr. Lacey was Vice President and Chief Financial Officer of Rawlings Sporting Goods Co., Inc., a manufacturer and retailer of sports equipment and apparel, from 2000 to 2003. Mr. Lacey holds a B.S. from the University of Alabama.

Mr. Olthoff has served as our General Counsel and Corporate Secretary since 2005. Prior to joining us, Mr. Olthoff was Staff Counsel of TrinTel Communications, Inc. an owner, operator and developer of infrastructure for the wireless communications industry, from 2001 to 2005. Prior to that, Mr. Olthoff was with Sprint (now SprintNextel). Mr. Olthoff holds a B.B.A. from the University of Missouri at Kansas City and a J.D. from the University of Missouri at Kansas City.

Ms. Hassenpflug has served as our Vice President-Human Resources since July 2007; and our Director of Human Resources from November 1998 to July 2007. Ms. Hassenpflug holds a B.S. from the Virginia Polytechnic Institute and State University.