EXHIBIT 99.1

                            CERTIFICATION PURSUANT TO
                             18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

     In connection with the accompanying Annual Report of 3TEC Energy Company
(the "Company") on Form 10-K for the period ending December 31, 2002 as filed
with the Securities and Exchange Commission on the date hereof (the "Report"),
I, Floyd C. Wilson, Chief Executive Officer of the Company, hereby certify,
pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the
Sarbanes-Oxley Act of 2002,to the best of my knowledge and belief that:

     (1)  The Report fully complies with the requirements of section 13(a) or
          15(d) of the Securities Exchange Act of 1934; and

     (2)  The information contained in the Report fairly presents, in all
          material respects, the financial condition and results of operations
          of the Company.

                                                /s/ Floyd C. Wilson
                                                Chief Executive Officer
                                                March 26, 2003

A signed original of this written statement required by Section 906 has been
provided to 3TEC Energy Company and will be retained by 3TEC Energy Company and
furnished to the Securities and Exchange Commission or its staff upon request.