Exhibit 99.1

                    CERTIFICATION BY CHIEF EXECUTIVE OFFICER
                       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 Quarterly Report of Genesis Energy, L.P. (the
"Partnership") on Form 10-Q for the quarter ended March 31, 2003 (the "Report")
filed with the Securities and Exchange Commission, I, Mark J. Gorman, President
and Chief Executive Officer of Genesis Energy, Inc., the general partner of the
Partnership, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to
Section 906 of the Sarbanes-Oxley Act of 2002, that:

      (1)   the Partnership's  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 Form 10-Q fairly presents, in all
            material respects, the financial condition and results of operations
            of the Partnership.



May 12, 2003                              /s/ Mark J. Gorman
                                          --------------------------------------
                                          Mark J. Gorman
                                          President and Chief Executive Officer,
                                          Genesis Energy, Inc.