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) |