Exhibit 32.1

Certification of Principal Executive Officer

Pursuant to 18 U.S.C. 1350 (Section 906 of the Sarbanes-Oxley Act of 2002)

I, Thomas G. Mair, President and Chief Executive Officer of Golden Star Resources Ltd., certify, to the best of my knowledge, based upon a review of the Quarterly Report on Form 10-Q for the period ended September 30, 2012 of Golden Star Resources Ltd. that:

(1) The Quarterly Report on Form 10-Q fully complies with the requirements of Section 13(a) of the Securities Exchange Act of 1934, as amended; and

(2) The information contained and incorporated by reference in the Quarterly Report on Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of Golden Star Resources Ltd.

/s/ Thomas G. Mair

Thomas G. Mair

President and Chief Executive Officer

November 7, 2012