Exhibit 23.1
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We consent to the incorporation by reference in this Registration Statement on Form S-3 of our reports dated September 8, 2011, relating to the consolidated financial statements and financial statement schedule of Matrix Service Company, and the effectiveness of Matrix Service Company’s internal control over financial reporting, appearing in the Annual Report on Form 10-K of Matrix Service Company for the year ended June 30, 2011, and to the reference to us under the heading “Experts” in the Prospectus, which is part of this Registration Statement.
/s/ DELOITTE & TOUCHE LLP
Tulsa, Oklahoma
January 6, 2012