(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)

ENERGY SERVICE COMPANY, INC. 1988 EMPLOYEE INCENTIVE 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. 33-41294) (the “Registration Statement”), ENSCO International Incorporated (formerly Energy Service Company, Inc.), a Delaware corporation (the “Company”), registered 445,408 of its shares of common stock, par value $0.10 per share (the “Common Shares”), issuable pursuant to the Energy Service Company, Inc. 1988 Employee Incentive Plan (the “Plan”).

          All rights of participants under the Plan to receive grants of Common Shares, restricted stock or any other equity-based awards have expired or have been exercised. 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
	David M. Carmichael			Director		December 22, 2009
	/s/ J. Roderick Clark
	J. Roderick Clark			Director		December 22, 2009
	/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