Exhibit 24(a)

POWER OF ATTORNEY

FORM S-3 REGISTRATION STATEMENT

I, the undersigned director of Northrop Grumman Corporation hereby constitute and appoint Sheila C. Cheston and Jennifer C. McGarey, and each of them singly, the undersigned director’s true and lawful attorneys with full power to any of them, and to each of them singly, to sign for the undersigned director and in the undersigned director’s name the Registration Statement on Form S-3 filed herewith and any and all amendments (including post-effective amendments) to said Registration Statement and generally to do all such things in the undersigned director’s name and behalf in the undersigned director’s capacity to enable Northrop Grumman Corporation to comply with the provisions of the Securities Act of 1933, as amended, and all requirements of the Securities and Exchange Commission, hereby ratifying and confirming the undersigned director’s signature as it may be signed by said attorneys, or any of them, to said Registration Statement and any and all amendments (including post-effective amendments) thereto.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of this 21^st day of July, 2011.

/s/ Lewis W. Colman

Lewis W. Coleman

/s/ Victor H. Fazio

Victor H. Fazio

/s/ Donald E. Felsinger

Donald E. Felsinger

/s/ Stephen E. Frank

Stephen E. Frank

/s/ Bruce S. Gordon

Bruce S. Gordon

/s/ Madeleine Kleiner

Madeleine Kleiner

/s/ Karl J. Krapek

Karl J. Krapek

/s/ Richard B. Myers

Richard B. Myers

/s/ Aulana L. Peters

Aulana L. Peters

/s/ Kevin W. Sharer

Kevin W. Sharer