EXHIBIT 23

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We have issued our report dated June 27, 2008, accompanying the financial statements and schedule incorporated by reference in the Annual Report of Argon ST, Inc. 401(k) Profit Sharing Plan on Form 11-K for the three month period ended December 31, 2007. We hereby consent to the incorporation by reference of said report in the Registration Statement of Argon ST, Inc. on Form S-8 (File No. 333-132174 and No. 333-149477).

/s/ Grant Thornton LLP

McLean, Virginia
June 27, 2008