This excerpt taken from the PXD DEF 14A filed Apr 30, 2009.
Frank W. Hall. Mr. Hall was elected the Company’s Vice President and Chief Accounting Officer in May 2008. Mr. Hall was also elected Vice President and Chief Accounting Officer of Pioneer GP in May 2008. Prior to that time, Mr. Hall held the positions for the Company of Corporate Controller from March 2007, Assistant Controller from January 2005 to March 2007 and Manager of Financial Reporting from September 1998 to January 2005. From 1989 to 1998, Mr. Hall was an employee of Oryx Energy Company, where he held Senior Financial Analyst positions in Financial Planning and Financial Reporting. He was a partner in the certified public accounting firm of Hall, Brock & Co. from 1983 to 1989; the Controller of Riddle Oil Company from 1980 to 1983; and a member of the audit staff of Touche Ross & Co. from 1977 to 1980. Mr. Hall graduated with highest honors from the University of Dallas with a Master of Business Administration in Corporate Finance and graduated from the University of Texas at San Antonio with a Bachelor of Business Administration, where he majored in accounting and business management.