EXHIBIT A JOINT FILING AGREEMENTJoint Filing Agreement • July 19th, 2007 • MHR Fund Management LLC • Drilling oil & gas wells
Contract Type FiledJuly 19th, 2007 Company IndustryThe undersigned hereby agree that this Schedule 13G with respect to the shares of common stock of Key Energy Services, Inc., dated as of July 19, 2007, is, and any amendments thereto (including amendments on Schedule 13D) signed by each of the undersigned shall be, filed on behalf of each of the undersigned pursuant to and in accordance with the provisions of Rule 13d-1(k) under the Securities Exchange Act of 1934.