Canadian Superior Energy Inc. Announces Departure of COO

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FOR: Canadian Superior Energy Inc.

TSX SYMBOL: SNG
NYSE Amex SYMBOL: SNG

Canadian Superior Energy Inc. Announces Departure of COO

MAY 4, 2010 – 18:35 ET

CALGARY, ALBERTA–(Marketwire – May 4, 2010) – Canadian Superior Energy Inc. (“Canadian Superior” or the “Company”) (TSX:SNG) (NYSE Amex:SNG) today announced that Leif Snethun, Chief Operating Officer, will be leaving the company effective May 4, 2010.
“On behalf of Canadian Superior’s Board of Directors, I would like to thank Leif for his contributions to the company, and wish him well for the future,” said Marvin Chronister, Chairman of the Board.

Mr. Snethun was appointed as the Chief Operating Officer on April 30, 2009. He initially joined the company in February 2008 as Vice President, Western Canada. Until a replacement is in place, Mr. Snethun’s portfolio will be managed by Mr. Bill Dirks, who has been retained by Canadian Superior on a consulting basis, with the support of Canadian Superior’s Board of Directors.Bill Dirks has 29 years of E&P leadership experience, with an expertise in the North American onshore basins of the US and Canada. His recent background includes roles as Managing Partner of Tecton Energy, LLC, a privately-owned E&P company he co-founded, (2006-2009); President of Samson Canada Ltd., (2002-2005), and Vice President of Business Development for Samson Resources (2001-2002). From 1981-1999 he worked for the Royal Dutch / Shell Group of companies in a variety of roles, including President and Chief Executive Officer of Shell Technology Ventures Inc., Division Manager of Shell’s Onshore U.S. Exploration Division, District Manager of the Deepwater Gulf of Mexico Division, and Manager and Budget Coordinator of Shell Oil Co. E&P Finance.

About Canadian Superior
Canadian Superior Energy Inc. is a Calgary, Alberta, Canada based diversified global energy company engaged in the exploration and production of oil and natural gas and in the development of a liquefied natural gas (“LNG”) project. Its operations are located offshore Trinidad and Tobago, Western Canada, North Africa, offshore Eastern Canada, and offshore Eastern United States. See Canadian Superior’s website at http://www.cansup.com/“>www.cansup.com to review further detail on Canadian Superior’s operations.This news release contains forward-looking information, including the expectation of successful future results. Actual results could differ materially due to changes in project schedules, commercial negotiations, changes in energy pricing, unforeseen technical or the inability to raise additional capital, therefore there can be no assurance that any of the foregoing actions by the Company will be completed as contemplated. Forward-looking information contained in this news release is as of the date of this news release. The Company assumes no obligation to update and/or revise this forward-looking information except as required by law.Statements contained in this news release relating to future results, events and expectations are forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended and Section 21E of the Securities Exchange Act of 1934, as amended. These forward-looking statements involve known and unknown risks, uncertainties, scheduling, re-scheduling and other factors which may cause the actual results, performance, estimates, projections, resource potential and/or reserves, interpretations, prognoses, schedules or achievements of the Company, or industry results, to be materially different from any future results, performance or achievements expressed or implied by such statements. Such factors include, among others, those described in the Company’s annual reports on Form 40-F or Form 20-F on file with the U.S. Securities and Exchange Commission.
FOR FURTHER INFORMATION PLEASE CONTACT:

Canadian Superior Energy Inc.
Investor Relations
(403) 294-1411
(403) 216-2374 (FAX)
www.cansup.com

or

Canadian Superior Energy Inc.
Suite 3200, 500 – 4th Avenue S.W.
Calgary, Alberta, Canada
T2P 2V6