POST-EFFECTIVE AMENDMENT NO. 1 TO

(Exact name of registrant as specified in its charter)

Delaware		76-0232579
(State or other jurisdiction		(I.R.S. Employer
of incorporation or organization)		Identification Number)
500 North Akard Street, Suite 4300
Dallas, Texas		75201-3331
(Address of Principal Executive Offices)		(Zip Code)

ENSCO INTERNATIONAL INCORPORATED
1996 NON-EMPLOYEE DIRECTORS STOCK OPTION PLAN
(Full title of the plan)

CARY A. MOOMJIAN, JR.
Vice President, General Counsel and Secretary
500 North Akard Street, Suite 4300
Dallas, Texas 75201-3331
(214) 397-3000
(Name, address, including zip code, and telephone number, including area code, of agent for service)

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer		x		Accelerated filer		o
Non-accelerated filer		o (Do not check if a smaller reporting company)		Smaller reporting company		o

EXPLANATORY NOTE

          Pursuant to its Registration Statement on Form S-8 (File No. 333-10733) (the “Registration Statement”), ENSCO International Incorporated, a Delaware corporation (the “Company”), registered 300,000 of its shares of common stock, par value $0.10 per share (the “Common Shares”), issuable pursuant to the stock options granted under the ENSCO International Incorporated 1996 Non-Employee Directors Stock Option Plan (the “Plan”).

          All stock options, restricted stock or any other equity-based awards that were granted under the Plan have expired or been exercised, and no more stock options will be granted. Pursuant to the undertaking made by the Company and required by Item 512(a)(3) of Regulation S-K, the Company files this Post-Effective Amendment No. 1 to the Registration Statement for the purpose of removing from registration those Common Shares that were not issued pursuant to the Plan.

          Pursuant to the requirements of the Securities Act of 1933, as amended, the registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Dallas, State of Texas, on December 22, 2009.

          Pursuant to the requirements of the Securities Act of 1933, this Registration Statement has been signed by the following persons in the capacities and on the dates indicated.

Signature		Title		Date
/s/ David M. Carmichael		Director		December 22, 2009
David M. Carmichael
/s/ J. Roderick Clark		Director		December 22, 2009
J. Roderick Clark
/s/ C. Christopher Gaut   C. Christopher Gaut		Director		December 22, 2009
/s/ Gerald W. Haddock   Gerald W. Haddock		Director		December 22, 2009
/s/ Thomas L. Kelly II   Thomas L. Kelly II		Director		December 22, 2009
/s/ Daniel W. Rabun   Daniel W. Rabun		Chairman, President and Chief Executive Officer		December 22, 2009
/s/ Keith O. Rattie   Keith O. Rattie		Director		December 22, 2009
/s/ Rita M. Rodriguez   Rita M. Rodriguez		Director		December 22, 2009
/s/ Paul E. Rowsey   Paul E. Rowsey		Director		December 22, 2009
/s/ James W. Swent III   James W. Swent III		Senior Vice President – Chief Financial Officer		December 22, 2009
/s/ David A. Armour   David A. Armour		Vice President – Finance		December 22, 2009
/s/ Douglas J. Manko   Douglas J. Manko		Controller		December 22, 2009