SPECIAL POWER OF ATTORNEY

The undersigned, Carl G. Annessa, of Mendeville, St. Tammany, Louisiana, (City,
County and State) does hereby appoint, reserving full power of substitution and revocation, Todd
M. Hornbeck, James O. Harp, Jr., Timothy P. McCarthy and Paul M. Ordogne, each a resident of
Louisiana, to act jointly or severally at their discretion, one with full authority to act for the
others, as his true and lawful attorney-in-fact, upon the following terms and conditions:
1. Special Powers.  The attorney-in-fact may act in the name, place and stead of the
undersigned, and on behalf of the undersigned do and execute all or any of the following acts,
deeds, and things, to-wit:
(a) Execute for and on behalf of the undersigned, in the undersigned's
capacity as an executive officer, director and/or 10% or more beneficial owner of shares
of common stock of Hornbeck Offshore Services, Inc. (the "Company"), Forms 3, 4, and
5, as applicable, in accordance with Section 16 of the Securities Exchange Act of 1934,
as amended (the "Exchange Act"), and the rules thereunder.
(b) Do and perform any and all acts for and on behalf of the undersigned
which may be necessary or desirable to complete and execute any such Form 3, 4, or 5,
complete and execute any amendment or amendments thereto, and file such form and any
amendments with the United States Securities and Exchange Commission and any stock
exchange, association or similar authority.
(c) Take any other action of any type whatsoever in connection with the
foregoing which, in the opinion of such attorney-in-fact, may be of benefit to, in the best
interest of, or legally required by, the undersigned, it being understood that the
documents executed by such attorney-in-fact on behalf of the undersigned pursuant to
this Special Power of Attorney shall be in such form and shall contain such terms and
conditions as such attorney-in-fact may approve in such attorney-in-fact's discretion.
(d) The undersigned hereby grants to such attorney-in-fact full power and
authority to do and perform any and every act and thing whatsoever requisite, necessary,
or proper to be done in the exercise of any of the rights and powers herein granted, as
fully to all intents and purposes as the undersigned might or could do if personally
present, hereby ratifying and confirming all that such attorney-in-fact shall lawfully do or
cause to be done by virtue of this power of attorney and the rights and powers herein
granted. The undersigned acknowledges that the foregoing attorney-in-fact, in serving in
such capacity at the request of the undersigned, is not assuming, nor is the Company
assuming, any of the undersigned's responsibilities to comply with Section 16 of the
Exchange Act, or any other provision of the federal or state securities laws, rules and
regulations.
2. Effective Period.  This Special Power of Attorney, and the powers expressed
herein, shall be effective from March 22, 2004, and shall remain in full force and effect until the
undersigned is no longer required to file Forms 3, 4, and 5 with respect to the undersigned's
holdings of and transactions in securities issued by the Company, unless earlier revoked by the
undersigned in accordance with the provisions contained herein.
3. Construction.  This instrument is a special power of attorney, granting to the
attorney-in-fact only the specific powers expressed herein.
4. Revocation.  This Special Power of Attorney may be voluntarily revoked by the
undersigned only by a written revocation delivered to the Company at its principal place of
business.  The undersigned agrees that any third party who receives a copy of this power of
attorney may act under it.  Revocation of this power of attorney is not effective as to a third party
until the third party receives actual notice of the revocation.  The undersigned agrees to
indemnify the third party for any claims that arise against the third party because of reliance on
this power of attorney.
5. Disability of Principal.  This Special Power of Attorney shall not terminate upon
the undersigned's disability or incompetency.
6. Bond.  The attorney-in-fact shall not be obligated to furnish bond or other
security.
7. Reliance.  This Special Power of Attorney shall be conclusive proof that the
rights, power, and authority granted to the attorney-in-fact are in full force and effect and may be
relied upon by any person who acts in good faith under this power of attorney. The undersigned's
death shall not revoke or terminate this agency as to the attorney-in-fact or any other person who
without actual knowledge of the undersigned's death acts in good faith under this power of
attorney.  An affidavit executed by the attorney-in-fact, stating that he did not have at the time of
doing an act pursuant to this power of attorney actual knowledge of the revocation or termination
of this power of attorney, is in the absence of fraud, conclusive proof of the validity of the
attorney-in-fact's act.
8. Incapacity of Attorney-in-Fact.  In the event any attorney-in-fact serving becomes
unable to discharge his fiduciary duties hereunder by reason of accident, physical or mental
deterioration, or other similar cause as certified by two independent, licensed physicians, each
affirming that he has examined the attorney-in-fact and that he has concluded based on his
examination that the attorney-in-fact is unable to discharge his duties hereunder, that
attorney-in-fact shall thereupon cease to be the attorney-in-fact as if he had resigned on the date
of that certification.
9. Governing Law.  This power of attorney shall be governed by the laws of the
State of Delaware in all respects.  Should any provision hereof be held invalid, that invalidity
shall not affect the other provisions which shall remain in full force and effect.
10. Copies.  This instrument may be filed of record in any jurisdiction as may be
deemed appropriate by the attorney-in-fact, and copies of this instrument certified as "true"
copies by the Clerk of any county or parish in which this instrument is filed shall be treated as
original copies for all purposes.
11. Captions.  The captions used in this instrument have been inserted for
administrative convenience only and do not constitute matters to be construed in interpreting this
power of attorney.
SIGNED the 19th day of March, 2004.


/s/ Carl G. Annessa
Carl G. Annessa, Vice President	 (Print Name and Title)


STATE OF LOUISIANA

PARISH OF ST. TAMMANY

BEFORE ME, the undersigned, a Notary Public in and for said State, on this day
personally appeared Carl G. Annessa, known to me to be at least eighteen (18) years of age and
the person whose name is subscribed to the foregoing instrument, and acknowledged to me that
he executed the same for the purposes and consideration therein expressed.

GIVEN UNDER MY HAND AND SEAL OF OFFICE this 19th day of March, 2004.

 /s/ Samuel A. Giberga
Notary Public



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