Jennifer M. Grigsby has served as Senior Vice President and Treasurer since March 2007 and as Corporate Secretary since 2000. She served as Vice President from April 2006 to March 2007 and as Assistant Treasurer from 1998 to March 2007. From 1995 to 1998, she served in various accounting positions with the Company. Ms. Grigsby was employed by Commander Aircraft Company as Supervisor of Finance and Human Resources from 1994 to 1995 and by Deloitte & Touche LLC from 1991 to 1994. Ms. Grigsby is a Certified Public Accountant and Certified Equity Professional. She graduated from Oklahoma State University in 1991 and from Oklahoma City University in 1999.