EXHIBIT 32.2



                                CERTIFICATION OF
                             CHIEF FINANCIAL OFFICER
                      OF PIONEER NATURAL RESOURCES COMPANY
                         PURSUANT TO 18 U.S.C. ss. 1350


         I,  Timothy L. Dove,  Executive  Vice  President  and  Chief  Financial
Officer of Pioneer Natural  Resources  Company (the  "Company"),  hereby certify
that the  accompanying  report on Form 10-Q for the quarterly  period ended June
30,  2003 and filed with the  Securities  and  Exchange  Commission  on the date
hereof  pursuant to Section  15(d) of the  Securities  Exchange Act of 1934 (the
"Report") by the Company fully complies with the requirements of that section.

         I further certify  that the information contained  in the Report fairly
presents,  in all  material  aspects,  the  financial  condition  and results of
operations of the Company.




                                 /s/ Timothy L. Dove
                                 -----------------------------------------
                           Name: Timothy L. Dove, Executive Vice
                                  President and Chief Financial Officer
                                 Date:   July 31, 2003