Exhibit 31.1

I, Edward R. Muller, certify that:

1. I have reviewed this Form 10-Q/A for the period ended June 30, 2010, of Mirant Corporation; and

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report.

Date: September 9, 2010

By:	/s/ Edward R. Muller
	Edward R. Muller Chairman of the Board, President and Chief Executive Officer (Principal Executive Officer)