Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statement on Form S-8 (No. 333-164688) of Mistras Group, Inc. of our report dated August 16, 2010 relating to the financial statements, which appears in this Form 10-K.

/s/ PricewaterhouseCoopers LLP

New York, New York

August 16, 2010