<PAGE>

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                   FORM 10-K/A
                                 AMENDMENT NO.1

(Mark One)

   [X]   Annual report pursuant to Section 13 or 15(d) of the Securities
         Exchange Act of 1934 for the fiscal year ended December 31, 2004

   [ ]   Transition report pursuant to Section 13 or 15(d) of the Securities
         Exchange Act of 1934

                         COMMISSION FILE NUMBER 0-23383

                           OMNI ENERGY SERVICES CORP.
             (Exact name of registrant as specified in its charter)

                LOUISIANA                                  72-1395273
     (State or other jurisdiction of                    (I.R.S. Employer
      incorporation or organization)                    Identification No.)

       4500 N.E. EVANGELINE THRUWAY                          70520
           CARENCRO, LOUISIANA                             (Zip Code)
 (Address of principal executive offices)

       Registrant's telephone number, including area code: (337) 896-6664

          Securities registered pursuant to Section 12(b) of the Act:

                                      None

           Securities registered pursuant to Section 12(g) of the Act:

                     Common Stock, $0.01 par value per share

Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the preceding 12 months (or for such shorter period that the registrant was
required to file such reports) and (2) has been subject to such filing
requirements for the past 90 days. Yes [X] No [ ]

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405
of Regulation S-K is not contained herein, and will not be contained, to the
best of registrant's knowledge, in definitive proxy or information statements
incorporated by reference in Part III of this Form 10-K or any amendment to this
Form 10-K. [ ]

Indicate by check mark whether the registrant is an accelerated filer (as
defined in Rule 12b-2 of the Act). Yes [ ] No [X]

The aggregate market value of the voting stock held by non-affiliates of the
Registrant at June 30, 2004 was $55,690,597.

The number of shares of the Registrant's common stock, $0.01 par value per
share, outstanding at March 28, 2005 was 11,679,565.

                       DOCUMENTS INCORPORATED BY REFERENCE

None.

<PAGE>

                                EXPLANATORY NOTE

      On April 18, 2005, OMNI Energy Services Corp. (the "Company") filed with
the Securities and Exchange Commission (the "SEC") its Annual Report on Form
10-K for the year ended December 31, 2004 (the "Initial Form 10-K"). In
accordance with the SEC rules, the Company incorporated by reference Part III of
the Initial Form 10-K from the Proxy Statement to be filed by the Company in
connection with its 2005 Annual Stockholders' Meeting, which the Company
anticipated filing on or before May 2, 2005. Since filing the Initial Form 10-K,
the Company has determined that it will not file its Proxy Statement prior to
the May 2 deadline and, in accordance with SEC rules, must file an amendment to
its Initial Form 10-K to include the disclosures required by Part III of Form
10-K. This Amendment No. 1 on Form 10-K/A amends Part III of the Initial Form
10-K in order to include those disclosures required by Part III of Form 10-K.

                                    PART III

ITEM 10. DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT.

DIRECTORS

      The following table sets forth, as of April 26, 2005, certain information
about the Company's directors. All of the directors are elected annually for a
one-year term. There are no arrangements or understandings between the Company
and any person pursuant to which such person has been elected a director, and no
director is related to any other director or executive officer of the Company.

<TABLE>
<CAPTION>
    DIRECTORS                AGE        POSITION
    ---------                ---        --------
<S>                          <C>   <C>
 James C. Eckert              55   Chairman of the Board
Michael G. DeHart             54      Director (1) (2)
 David A. Melman              62      Director (1) (3)
Craig P. Rothwell             50        Director (3)
Richard C. White              50      Director (1) (2)
</TABLE>

      (1) Member of Compensation Committee

      (2) Member of Audit Committee

      (3) Member of the Corporate Governance Committee

      James C. Eckert has served as President, Chief Executive Officer and a
Director of the Company since March 2001. From 1998 to 2000, Mr. Eckert served
as Vice-President for Business Development of Veritas DGC Land, Inc. From 1992
to 1998, Mr. Eckert supervised the highland and transition seismic acquisitions
of Veritas DGC Land, Inc. He served as President of GFS Company, a company that
he co-founded in 1985, until its acquisition in 1992 by Digiton, Inc., a
predecessor by merger to Veritas, Inc. Mr. Eckert graduated from the University
of Southern Mississippi in 1971.

      Michael G. DeHart is a Certified Public Accountant and has been employed
as the President and Chief Investment Officer for Stuller Management Services,
Inc., since June 2001. Prior to that, Mr. DeHart was a partner with the
accounting firm Wright, Moore, DeHart, Dupuis and Hutchinson, L.L.C. He was a
member of that firm's management committee from 1998 to May 2001. Mr. DeHart
received an M.B.A. from the University of Southwestern Louisiana and has been a
director of the Company since November 2000. Mr. DeHart is Chairman of the Audit
Committee.

      David A. Melman has been the Chairman of the Board of XCL, Ltd., a U.S.
based natural resource holding company with operational interests in China,
since May of 2000. Since June 2002, he has been the Chief Executive Officer of
Republic Resources, Inc., a Louisiana based environmental company, engaged in
containment and treatment of contaminated ground water. Mr. Melman has an
undergraduate degree in economics, a Juris Doctorate and a Masters of Law
(Taxation). From June 2003 to May 2004, Mr. Melman was a director of Beta Oil
and Gas, Inc., predecessor of Petrohawk Energy Corporation. Mr. Melman has been
a director of the Company since February 2004 and is Chairman of the Corporate
Governance Committee.

                                       2

<PAGE>

      Craig P. Rothwell served as President and Chief Operating Officer of
Veritas DGC Land, Inc. (a division of Veritas DGC, Inc.) from 1993 until April
2004 at which time he resigned his position with Veritas DGC Land, Inc. From
1983 until 1992 he served in different capacities with Veritas DGC Land, Inc.
including General Manager and Senior V.P. of Operations. Mr. Rothwell has been a
director of the Company since April 2004.

      Richard C. White is the former President and Chief Executive Officer of
NuTec Energy Services Inc. He held that position from October of 2001, until his
retirement in September 2002. He was Chief Executive Officer of Veritas DGC
Land, Inc. from January 2000 through June 2000. From 1995 until his retirement
in October 1999, Mr. White served as President of Western Geophysical Company,
as well as Senior Vice President of Western Atlas Inc. He also served as
President of Baker Hughes Incorporated from August 1998 until October 1999.
Prior to 1995, he held various other executive positions with Western
Geophysical Company, including Chief Operating Officer. Mr. White graduated from
Bloomsberg University in 1978 and has been a director of the Company since March
2001. Mr. White is Chairman of the Compensation Committee.

AUDIT COMMITTEE

      Under rules adopted by the SEC, the Company is required to disclose
whether it has an "Audit Committee Financial Expert" serving on its Audit
Committee. The Audit Committee does not have a designated audit committee
financial expert. The Board of Directors and each of the members of the Audit
Committee believe that the Audit Committee as presently comprised thoroughly and
adequately performs its primary functions without a member designated as an
audit committee financial expert. However, as the Company's operations expand in
the future, the Board and the Audit Committee will seek to add a member that is
qualified to serve as an audit committee financial expert. Management believes
that at least one member of the Audit Committee is capable of: (i) understanding
generally accepted accounting principles and financial statements; (ii)
assessing the general application of these principles in connection with the
accounting for estimates, accruals and reserves; (iii) preparing, auditing,
analyzing and evaluating the Company's consolidated financial statements; (iv)
understanding internal control over financial reporting; and (v) understanding
audit committee functions. All Audit Committee members are "independent
directors," as such term is defined in NASD's Rule 4200 (a) (15).

      The responsibilities of our audit committee include:

            -     engaging an independent audit firm to audit our financial
                  statements and to perform services related to the audit;

            -     reviewing the scope and results of the audit with our
                  independent auditors;

            -     considering the adequacy of our internal accounting control
                  procedures;

            -     considering auditors' independence; and

            -     approving all audit and non-audit services with our
                  independent auditors.

      The board of directors has adopted a written charter for the audit
committee which is available on the Company's website, www.omnienergy.com and to
any stockholder upon request. The audit committee held eighteen formal meetings
during fiscal year 2004.

EXECUTIVE OFFICERS AND KEY MANAGERS

      The name, age and offices held by each of the executive officers and key
managers as of April 26, 2005 are as follows:

<TABLE>
<CAPTION>
              NAME                         AGE                  POSITION
-------------------------------    ------------------ --------------------------------------------------------
<S>                                <C>                <C>
James C. Eckert                            55         President and Chief Executive Officer
G. Darcy Klug                              53         Executive Vice President
Rene M. J. VandenBrand                     47         Vice President - Aviation Services
Shawn L. Rice                              43         Vice President - Quality Health Safety and Environmental
</TABLE>

      Information regarding Mr. Eckert is contained above under "Directors".

      G. Darcy Klug was promoted to the position of Executive Vice President in
March 2004. He joined us as our Chief Financial Officer in May 2001, after being
involved in private investments since 1987. Between 1983 and 1987, Mr. Klug held
various positions with a private oil and gas fabrication company, including the
position of Chief Operating Officer and Chief Financial Officer. Prior to 1983,
he held various financial positions with Galveston-Houston Company, a
manufacturer of oil and gas equipment listed for trading

                                       3

<PAGE>

on the New York Stock Exchange. Between 1973 and 1979, he was a member of the
audit staff of Coopers & Lybrand (now PricewaterhouseCoopers LLP).

      Rene M.J. Vandenbrand joined the Company as its Vice President - Aviation
Services in August 2004. In this capacity, Mr. VandenBrand is responsible for
the overall business and administrative functions of the Company's aviation
operations. Since 1995, Mr. VandenBrand held various management positions with
Veritas DGC Inc., including Vice President of Business Development and Senior
Vice President Finance & Business Development of Land Acquisitions. Prior to
joining Veritas, Mr. VandenBrand was a partner with Coopers & Lybrand (now
PricewaterhouseCoopers LLP) in Calgary, Alberta. He holds an undergraduate
degree in Business Administration from Wilfrid Laurier University and a Master
of Business Administration from the University of Calgary. He holds
certifications as a Chartered Accountant, a Chartered Financial Analyst and a
Chartered Business Valuator.

      Shawn L. Rice joined OMNI as its Vice President - QHSE (Quality, Health,
Safety and Environment) in 2004, after more than twenty years of international
and domestic management experience with WesternGeco, a joint venture of
Schlumberger and Baker Hughes. Since December 2000, Mr. Rice held the position
of Vice President, QHSE for WesternGeco's worldwide operations. In this capacity
he developed and managed all aspects of WesternGeco's QHSE structure, systems
and programs for more than 16,000 employees. Prior to December 2000, Mr. Rice
held various management positions with Western Geophysical, including Business
Services Manager responsible for Human Resources, QHSE and training for more
than 8,000 employees. He holds an engineering degree from Colorado School of
Mines.

SECTION 16(a) BENEFICIAL OWNERSHIP REPORTING COMPLIANCE

      The Company's directors, executive officers and 10% stockholders have
filed timely with the Commission reports of ownership and changes in ownership
of equity securities of the Company pursuant to Section 16(a) of the Securities
Exchange Act of 1934.

CODE OF ETHICS

      On June 17, 2004, the Company adopted a Code of Ethics that complies with
SEC requirements. The Code of Ethics is available in Company's website at
www.omnienergy.com and to any stockholder upon request. The Company intends to
disclose on its website any waivers or amendments to the Code of Ethics promptly
after such action.

ITEM 11.  EXECUTIVE COMPENSATION

ANNUAL COMPENSATION

      The following table sets forth all compensation information for the three
years ended December 31, 2004, for the Company's Chief Executive Officer and all
other executive officers whose total annual salary and bonus exceeded $100,000
(collectively, the "Named Executive Officers"). No other executive officer of
the Company had a total annual salary and bonus exceeding $100,000 during 2004.

                           SUMMARY COMPENSATION TABLE

<TABLE>
<CAPTION>
                                                                                               LONG-TERM
                                                                                             COMPENSATION
                                                                                                AWARDS
                                                                                   -------------------------------
                                                                                    NO. OF SHARES    NO. OF SHARES
                                                     ANNUAL COMPENSATION               UNDERLYING      RESTRICTED
                                            -------------------------------------     OPTIONS/SARS         STOCK       ALL OTHER
    NAME AND PRINCIPAL POSITION                 YEAR       SALARY         BONUS           GRANTED          AWARDS   COMPENSATION (1)
----------------------------------------    ---------    ----------     ---------  ---------------   -------------  ----------------
<S>                                         <C>          <C>            <C>        <C>               <C>            <C>
James C. Eckert                                2004      $ 203,500(2)   $ 261,222              --             --       $   79,200
   President and Chief Executing Officer       2003      $ 150,000      $      --          60,000        200,000       $        --
                                               2002      $ 113,750      $  91,625              --             --       $        --

G. Darcy Klug                                  2004      $ 165,100(2)   $ 182,222              --             --       $    64,072
   Executive Vice President                    2003      $ 115,000      $      --          40,000        161,800       $        --
                                               2002      $  83,000      $  37,500              --             --       $        --
</TABLE>

                                       4

<PAGE>

      (1)   Amounts paid in 2004 represent tax equalization payments paid in
            connection with certain restricted stock issue pursuant to the
            Restricted Stock Incentive Agreements more fully described herein.

      (2)   Includes $20,833 each, of retroactive salary payments for the year
            ended December 31, 2003, but paid in 2004 for Mr. Eckert and Mr.
            Klug.

2003 RESTRICTED STOCK INCENTIVE AGREEMENT AND 2003 STOCK OPTION AGREEMENT

      Effective December 1, 2003, we entered into Restricted Stock Incentive
Agreements, as amended, with Messrs. Eckert and Klug for the award of 200,000
shares and 161,800 shares, respectively, under the terms and conditions of the
Fifth Amended and Restated OMNI Energy Services Corp. Stock Option Plan (the
"Plan"). Under the terms of the amended Restricted Stock Incentive Agreement,
25% of such shares vested and were issued immediately on the day following our
2004 Annual Stockholder Meeting and the additional 75% of such shares vested on
November 30, 2004. Of the remaining vested but unissued shares, 50% will be
issued on the day following or 2005 Annual Stockholder Meeting and 50% will be
issued on the day following the 2006 Annual Stockholder Meeting.

2004 STOCK-BASED AWARD INCENTIVE AGREEMENT

      We also entered into Stock-Based Award Incentive Agreements (hereinafter
"SBA") for our executive officers on June 30, 2004. The SBA shall become
computed and payable: (a) on the date of the Employee's termination of
employment (for any reason other than resignation or termination for cause), (b)
90 days after the executive's death or disability or (c) upon a Change in
Control. The executive managers were awarded 55% and 45%, respectively, of: (1)
10% of the fair market value (hereinafter "FMV"), defined as the average closing
price per share on the NASDAQ National Market over the five prior trading days
times the number of issued and outstanding shares of the Company, of a share of
the Company's common stock greater than or equal to $1.00 but less than $1.50,
plus (2) 15% of the FMV of a share of the Company's common stock greater than or
equal to $1.50 but less than $2.50, plus (3) 20% of the FMV of a share of the
Company's common stock greater than or equal to $2.50 but less than $10.00, plus
(4) 15% of the FMV of a share of the Company's common stock greater than or
equal to $10.00 but less than $20.00, plus (5) 10% of the FMV of a share of the
Company's common stock greater than or equal to $20.00. If no payments have been
made, the right terminates on December 31, 2008 or upon termination of
employment for resignation or cause, whichever occurs first. The intrinsic value
of this award at December 31, 2004 is $1.4 million but no compensation expense
has been recorded at December 31, 2004 because the award is contingent on future
events none of which are considered probable at December 31, 2004. At this time,
Mr. Eckert and Mr. Klug are the only executive officers participating in the
SBA.

      During 2004, no stock appreciation rights and no options were granted to
executive officers.

STOCK OPTION HOLDINGS

      The following table sets forth information, as of December 31, 2004, with
respect to stock options held by the Named Executive Officers. None of the Named
Executive Officers exercised any options to purchase Common Stock in 2004.

                       AGGREGATE OPTION VALUES AT YEAR END

<TABLE>
<CAPTION>
                                   NUMBER OF SECURITIES                VALUE OF UNEXERCISED
                                  UNDERLYING UNEXERCISED               IN-THE-MONEY OPTIONS
                                    OPTIONS AT YEAR END                   AT YEAR END(1)
                            --------------------------------        ---------------------------
                            EXERCISABLE (2)    UNEXERCISABLE        EXERCISABLE   UNEXERCISABLE
                            ---------------    -------------        -----------   -------------
<S>                         <C>                <C>                  <C>           <C>
James C. Eckert                  556,656          35,010              $389,736      $     --

G. Darcy Klug                    311,793          23,340              $315,281      $     --
</TABLE>

      (1)   The closing sale price of the Common Stock on December 31, 2004 was
            $1.94 per share, as reported by the Nasdaq National Market.

      (2)   Includes 200,000 and 161,800 shares of restricted stock for Messrs.
            Eckert and Klug, respectively.


                                       5
<PAGE>
EXECUTIVE EMPLOYMENT AGREEMENTS

      Mr. Eckert and Mr. Klug have employment agreements with the Company that
are effective until December 31, 2008 with automatic extensions for additional,
successive one year periods commencing January 1, 2009, unless either party
gives notice of non-renewal as provided for under the terms of the employment
contracts. Annual base salaries for Mr. Eckert and Mr. Klug are $200,000 and
$165,000, respectively, effective April 1, 2004.

      If OMNI terminates either of Mr. Eckert's or Mr. Klug's employment without
cause (except as provided in the Plan, then OMNI shall, and only if and as long
as employee is not in breach of his obligations under the employment agreement,
promptly pay or otherwise provide to employee, in addition to those amounts set
forth in the Plan: (i) an amount equal to employee's monthly annual base salary
then in effect, payable semi-monthly and in accordance with OMNI's normal
payroll practices, for a period equal to the lesser of thirty (30) months or the
number of months remaining in the Initial Period or the Additional Period (both
defined in the employment contract); (ii) an annual bonus calculated on a daily
pro-rata basis to the bonus which would otherwise be payable under the Plan; and
(iii) an amount in cash equal to the fair market value, on the date of
termination of employment, of any vested, but un-issued restricted shares
granted employee and the amount of any non-vested stock-based award granted to
employee on November 4, 2003 pursuant to the Incentive Agreement of even date
therewith. Mr. Eckert and Mr. Klug each agree that the above payment shall be a
full settlement of OMNI's obligations to employee hereunder in the event of a
termination without cause.

COMPENSATION COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION

      None of the members of the Committee has at any time been an officer or
employee of the Company and none of these directors serve as a member of the
board of directors or compensation committee of any entity that has one or more
executive officers serving as a member of the Company's board or Committee.

COMPENSATION OF DIRECTORS

      Effective July 1, 2004, each non-employee director earns a retainer of
$15,000 per year, paid quarterly. These payments were made in 2004 to Messrs.
DeHart, Melman, Rothwell, White and Webb (who resigned on April 18, 2005) for
the first three quarters of 2004. Each non-employee director that serves on the
Audit Committee receives an additional $5,000 per year, and $7,500 per year for
being the Committee Chairman. Each non-employee director that serves on the
Compensation Committee or the Corporate Governance Committee receives an
additional $2,000 per year, and $3,000 per year for being the Committee
Chairman. All retainers are paid quarterly.

      In addition to the retainers that are paid to the Board and Committee
members, the Company pays a fee of $500 per Committee member for each Committee
meeting attended by such member. Each Board member will receive $2,500 for each
Board meeting attended in person (not telephonically) and called by the Chairman
of the Board and $1,000 for telephonic meetings.

      Each person who becomes a non-employee director is granted an option to
purchase 10,000 shares of Common Stock at an exercise price equal to the fair
market value of the Common Stock on the date such person becomes a director.

      Additionally, each year that the Plan is in effect and a sufficient number
of shares of Common Stock are available thereunder, each person who is a
non-employee director on the day following the annual meeting of the Company's
stockholders will be granted an option to purchase 5,000 shares of Common Stock
at an exercise price equal to the fair market value of the Common Stock on such
date. All such options become fully exercisable on the first anniversary of
their date of grant and expire on the tenth anniversary thereof, unless the
non-employee director ceases to be a director of the Company, in which case the
exercise periods will be shortened. Messrs. DeHart, Melman, Rothwell and White
received this earned option in 2004. Marshall Webb (who resigned on April 18,
2005), also received his earned options.


                                       6
<PAGE>
ITEM 12.  SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT.

      The following table sets forth, as of April 26, 2005 certain information
regarding beneficial ownership of Common Stock by (i) each of the Named
Executive Officers (as defined below in "Executive Compensation"), (ii) each
director of the Company, (iii) all of the Company's directors and executive
officers as a group and (iv) each stockholder known by the Company to be the
beneficial owner of more than 5% of the outstanding Common Stock, all as in
accordance with Rule 13d-3 under the Securities Exchange Act of 1934. Unless
otherwise indicated, the Company believes that the stockholders listed below
have sole investment and voting power with respect to their shares based on
information furnished to the Company by such stockholders.

<TABLE>
<CAPTION>
                                                                              PERCENTAGE OF
                                                       NUMBER OF SHARES       OUTSTANDING
    NAME OF BENEFICIAL OWNER                           BENEFICIALLY OWNED     COMMON STOCK
--------------------------------------------       ------------------------- -------------
<S>                                                <C>                       <C>
Manchester Securities Corp......................          1,391,672(1)           11.9%
   712 Fifth Avenue
   New York, NY 10017
Dennis Sciotto..................................          1,030,482(2)           8.8%
   7315 El Fuerte Street
   Carlsbad, CA  92009
Wellington Management Company, LLP..............            725,000(3)           6.2%
   75 State Street
   Boston, MA 02109
Portside Growth and Opportunity Fund                        695,836(4)           6.0%
   Chrysler Center 666 Third Ave. 26th floor
   New York, NY 10017
Provident Premier Master Fund Ltd.                          695,836(5)           6.0%
   35 Waterview Boulevard
   Parsippany, NJ 07054
James C. Eckert.................................            561,654(6)           4.8%
Michael G. DeHart...............................             33,333(7)           *
Richard C. White................................             31,666(8)           *
David A. Melman.................................             15,000(9)           *
Craig P. Rothwell...............................             15,000(10)          *
G. Darcy Klug...................................            315,125(11)          2.7%
All directors, executive officers and key
       managers as a group (6 persons)..........            971,778(12)          8.3%
</TABLE>

*     Less than one percent.

(1)   Based on 515,734 shares issuable upon conversion of $3.7 million in
      3-year, 6.5% fixed Convertible Debentures issued February 12, 2004 and
      255,938 shares issuable upon conversion of $1.8 million in 3-year 6.5%
      fixed rate Convertible Debentures issued April 15, 2004 and 620,000 shares
      issuable upon the exercise of warrants exercisable within sixty days.

(2)   Based on a filing made with the SEC reflecting ownership of Common Stock
      as of March 2, 2005. The filing indicates sole voting power with respect
      to 997,800 shares of Common Stock, shared voting power with respect to
      32,682 shares of Common Stock, sole dispositive power with respect to
      997,800 and shared dispositive power with respect to 32,682 shares of
      Common Stock.

(3)   Based on a filing made with the SEC reflecting ownership of Common Stock
      as of December 31, 2004. The filing indicates shared voting power with
      respect to 510,000 shares of Common Stock and dispositive power with
      respect to 725,000 shares of Common Stock.

                                       7
<PAGE>

(4)   Based on 257,867 shares issuable upon conversion of $1.8 million in
      3-year, 6.5% fixed Convertible Debentures issued February 12, 2004 and
      127,969 shares issuable upon conversion of $0.9 million in 3-year 6.5%
      fixed rate Convertible Debentures issued April 15, 2004 and 310,000 shares
      issuable upon the exercise of warrants exercisable within sixty days.

(5)   Based on 257,867 shares issuable upon conversion of $1.8 million in
      3-year, 6.5% fixed Convertible Debentures issued February 12, 2004 and
      127,969 shares issuable upon conversion of $0.9 million in 3-year 6.5%
      fixed rate Convertible Debentures issued April 15, 2004 and 310,000 shares
      issuable upon the exercise of warrants exercisable within sixty days.

(6)   Includes 561,654 shares issuable upon the exercise of options and
      restricted stock currently exercisable or exercisable within sixty days.

(7)   Includes 33,333 shares issuable upon the exercise of options currently
      exercisable or exercisable within sixty days.

(8)   Includes 31,666 shares issuable upon the exercise of options currently
      exercisable or exercisable within sixty days.

(9)   Includes 15,000 shares issuable upon the exercise of options currently
      exercisable or exercisable within sixty days.

(10)  Includes 15,000 shares issuable upon the exercise of options currently
      exercisable or exercisable within sixty days.

(11)  Includes 315,125 shares issuable upon the exercise of options and
      restricted stock currently exercisable or exercisable within sixty days.

(12)  Includes 971,778 shares that such persons have the right to receive upon
      the exercise of options currently exercisable or exercisable within sixty
      days.

ITEM 13.  CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS.

      During the years ended December 31, 1999, 2000 and 2001, we privately
placed with an affiliate subordinated debentures totaling $7.5 million, $3.4
million and $1.5 million, respectively. The debentures matured five years from
their date of issue and accrued interest at various rates ranging from a fixed
rate of 12% per annum to a variable rate of interest starting at 12% per annum
and escalating to 20% per annum. In October 2000, we agreed to convert $4.6
million of the subordinated debentures into our Series A Preferred. In May 2001,
we agreed to pay the affiliate $3.0 million cash plus issue to the affiliate
$4.6 million of the Company's Series B Preferred in satisfaction of all of the
remaining outstanding subordinated debentures including accrued interest of $1.8
million. This transaction resulted in the affiliate agreeing to forgive $1.0
million of indebtedness, which was reflected as a capital contribution from the
affiliate rather than as income in the accompanying financial statements. The
proceeds were used to redeem $8.2 million of the Series A Preferred outstanding,
including accrued dividends. The remaining 25 shares of Series A Preferred were
redeemed in April 2004 for $0.03 million. At December 31, 2004 there are no
Series A Preferred shares outstanding. During the first quarter of 2004, we
redeemed 2,286 shares of the Series B Preferred for $2.4 million, including
accrued dividends. In April 2004, we redeemed 2,285 shares of the total of 2,314
shares of the Series B Preferred outstanding for $2.5 million, including accrued
dividends. At December 31, 2004, 29 shares of Series B Preferred remain
outstanding.

      In connection with the original issuance of the subordinated debentures,
we issued to the affiliate detachable warrants to purchase 1,912,833 shares of
our common stock, of which 293,055 shares were transferred in 2003 to settle
certain litigation (See Note 9) and 858,678 shares were cancelled. The balance
of 761,100 shares was exercised during the first quarter of 2004 at an exercise
price of $2.25.

      During 2003, we entered into an agreement to facilitate the private
placement of approximately 1,650,000 shares of our common stock owned by an
affiliate and certain investors. The sale of the stock covered by this agreement
closed during the fourth quarter of 2003, resulting in our receipt of $0.4
million cash which was recorded as a reduction in our general and administrative
expenses during 2003.

                                       8
<PAGE>

      During 2003, in order to facilitate a settlement of ongoing litigation
between certain of our affiliates, we agreed to re-price and extend the maturity
dates of certain warrants owned by the defendant affiliates but transferred in
settlement of the litigation to the plaintiff affiliates. The exercise prices of
the transferred warrants ranged from $2.25 - $6.00 per share. The maturity dates
of the transferred warrants ranged from November 1, 2004 to July 1, 2005. The
transferred warrants were re-priced at $1.54 per share and the maturity dates
were extended to November 1, 2006. Accordingly, during 2003 we recorded a
non-cash charge of approximately $0.1 million representing the differences in
the fair market value of the originally issued warrants and the re-priced
warrants. At December 31, 2004, 10,283 of the $1.54 re-priced warrants were
outstanding.

      The following table summarizes the exercise prices of warrants as of
December 31, 2004:

<TABLE>
<CAPTION>
EXERCISE PRICE               WARRANTS
--------------               --------
<S>                          <C>
   $  1.54                      10,283
   $  2.25                      21,666
                             ---------
                                31,949
                             =========
</TABLE>

ITEM 14  PRINCIPAL ACCOUNTING FEES AND SERVICES

      Aggregate fees billed to the Company for the fiscal years ended December
31, 2004 and December 31, 2003 by Fitts Roberts & Co LLP and Ernst & Young LLP,
the Company's independent auditors for 2004 and 2003, respectively, were as
follows:

<TABLE>
<CAPTION>
                                              FISCAL YEAR ENDED
                                           2003             2004
                                       ------------   ---------------
<S>                                    <C>            <C>
Audit Fees (1)                         $    122,075   $       198,045
Audit Related Fees (2)                       11,075            93,870
                                       ------------   ---------------
                                            133,150           291,915

Tax Fees (3)                                 23,278            37,700
All Other Fees (4)                           29,033             5,850
                                       ------------   ---------------
                                             52,311            43,550

         Total Fees                    $    185,461   $       335,465
                                       ============   ===============
</TABLE>

(1)   Audit fees represent fees for professional services rendered in connection
      with the engagement to audit and report on the consolidated financial
      statements, review of our quarterly and annual consolidated financial
      statements, and required statutory audits of certain subsidiaries.

(2)   Audit-related fees consisted primarily of accounting and reporting
      research and consultations, related to internal control matters.

(3)   Includes fees for tax consulting services, tax compliances services and
      preparation of foreign tax filings.

(4)   The aggregate fees billed by Ernst & Young, LLP, Fitts Roberts & Co P.C.
      and BDO Seidman, LLP for services rendered to the Company other than
      services described under "Audit Fees", "Audit Related Fees" and "Tax
      Fees", for the fiscal year ended December 31, 2003 and 2004. These fees
      are general services related to the review of certain Security and
      Exchange Commission filings, other than quarterly and annual filings, and
      operational and transaction reviews.

PRE-APPROVAL POLICY

      The Audit Committee has adopted a policy to require pre-approval of all
audit and non-audit services provided by the Company's principal accounting
firm. All the services in 2004 under the audit fees, audit related fees, tax
fees and all other fees sections in the table above were pre-approved by the
Audit Committee.

                                       9
<PAGE>

      SIGNATURES

      In accordance with Section 13 or 15(d) of the Securities Exchange Act of
1934, the registrant has caused this report to be signed on its behalf by the
undersigned, thereunto duly authorized.

      OMNI ENERGY SERVICES CORP.

      (Registrant)

      By: /s/ James C. Eckert
          -------------------
      James C. Eckert
      President and Chief Executive Officer
      (Principal Executive Officer)

      Date:  May 2, 2005

      Pursuant to the requirements of the Securities Exchange Act of 1934, this
Report has been signed below by the following persons on behalf of the
Registrant and in the capacities and on the dates indicated.

<TABLE>
<CAPTION>
                 SIGNATURE                                               TITLE                                    DATE
-------------------------------------------      ---------------------------------------------------    -----------------
<S>                                              <C>                                                    <C>
    /s/ James C. Eckert                            President, Chief Executive Officer, Chairman of the         May 2,2005
---------------------------
    James C. Eckert                                       Board (Principal Executive Officer)

    /s/ G. Darcy Klug                                          Executive Vice President                        May 2,2005
---------------------------
    G. Darcy Klug                                        (Interim Principal Financial Officer)

    /s/ Craig P. Rothwell                                              Director                                May 2,2005
---------------------------
    Craig P. Rothwell

    /s/ David A. Melman                                                Director                                May 2,2005
---------------------------
    David A. Melman

    /s/ Michael G. DeHart                                              Director                                May 2,2005
---------------------------
    Michael G. DeHart

    /s/ Richard C. White                                               Director                                May 2,2005
---------------------------
    Richard C. White
</TABLE>

                                       10
<PAGE>

                           OMNI ENERGY SERVICES CORP.
                                  EXHIBIT INDEX

EXHIBIT NUMBER
--------------

31.3   Section 302 Certification of Chief Executive Officer

31.4   Section 302 Certification of Interim Principal Financial Officer

                                       11