EXHIBIT 32.1

CERTIFICATION PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

(SUBSECTIONS (A) AND (B) OF SECTION 1350,

CHAPTER 63 OF TITLE 18, UNITED STATES CODE)

I, James C. Eckert, of OMNI Energy Services Corp., certify, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) the Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2005 (the “Periodic Report”) which this statement accompanies 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 Periodic Report fairly presents, in all material respects, the financial condition and results of operations of OMNI Energy Services Corp.

Dated: November 14, 2005

/s/    JAMES C. ECKERT        

James C. Eckert

Chief Executive Officer