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S-1/A - AMENDMENT NO. 1 TO S-1 - ALION SCIENCE & TECHNOLOGY CORPd914250ds1a.htm

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the use in this Amendment No. 1 to Registration Statement No. 333-203705 of our report dated December 29, 2014 relating to the consolidated financial statements and financial statement schedule of Alion Science and Technology Corporation and subsidiaries appearing in the Prospectus, which is a part of such Registration Statement, and to the reference to us under the heading “Experts” in such Prospectus.

/s/ DELOITTE & TOUCHE LLP

McLean, VA

June 4, 2015