Cairn Energy USA S-4 Registration of securities issued in business combination transactions

Exhibit 23.5

CONSENT OF INDEPENDENT PETROLEUM ENGINEERS

     We hereby consent to the use of the name T.J. Smith & Company, Inc., to references to T.J. Smith & Company, Inc. as independent petroleum engineers, to the inclusion of information contained in our report as of December 31, 2010, and to the inclusion of our report as an exhibit in the Registration Statement on Form S-4 of Alta Mesa Holdings, LP and Alta Mesa Finance Services Corp. and the related prospectus that is a part thereof. We further consent to the reference to this firm under the heading “EXPERTS” in the Registration Statement and related prospectus.

Yours very truly,

T. J. Smith & Company, Inc.

/s/ T. J. SmithT. J. Smith

President

Houston, Texas
April 14, 2011