Exhibit 23.2

Consent of Independent Registered Public Accounting Firm

We consent to the reference to our firm under the caption “Experts” and to the use of our report dated June 18, 2010, in Amendment No. 3 to the Registration Statement (Form S-1 No. 333-167645) and related Prospectus of Booz Allen Hamilton Holding Corporation for the registration of shares of its Class A common stock.

/s/ Ernst and Young LLP

McLean, Virginia

September 29, 2010