Exhibit 24
POWER OF ATTORNEY
 
KNOW ALL MEN BY THESE PRESENTS, that the undersigned hereby constitutes and 
appoints each of Sheila C. Cheston and Jennifer C. McGarey, signing singly, the undersigned's 
true and lawful attorney-in-fact to:
(1) execute for and on behalf of the undersigned, in the 
undersigned's capacity as director of Northrop Grumman 
Corporation (the "Company"), Forms 3, 4, and 5 in accordance 
with Section 16(a) of the Securities Exchange Act of 1934 and the 
rules thereunder;
(2) do and perform any and all acts for and on behalf of the 
undersigned which may be necessary or desirable to complete and 
execute any such form 3, 4, or 5 and timely file such form with the 
United States Securities and Exchange Commission and any stock 
exchange or similar authority; and
(3) take any other action of any type whatsoever in connection 
with the foregoing which, in the opinion of such attorney-in-fact, 
may be of benefit to, in the best interest of, or legally required by, 
the undersigned, it being understood that the documents executed 
by such attorney-in-fact on behalf of the undersigned pursuant to 
this Power of Attorney shall be in such form and shall contain such 
terms and conditions as such attorney-in-fact may approve in such 
attorney-in-fact's discretion.
The undersigned hereby grants to each such attorney-in-fact full power and authority to do and 
perform any and every act and thing whatsoever requisite, necessary, or proper to be done in the 
exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the 
undersigned might or could do if personally present, with full power of substitution or 
revocation, hereby ratifying and confirming all that such attorney-in-fact, or such attorney-in-
fact's substitute or substitutes, shall lawfully do or cause to be done by virtue of this power of 
attorney and the rights and powers herein granted. The undersigned acknowledges that the 
foregoing attorneys-in-fact, in serving in such capacity at the request of the undersigned, are not 
assuming, nor is the Company assuming, any of the undersigned's responsibilities to comply with 
Section 16 of the Securities Exchange Act of 1934.
This Power of Attorney shall remain in full force and effect until the undersigned is no longer 
required to file Forms 3, 4, and 5 with respect to the undersigned's holdings of and transactions 
in securities issued by the Company, unless earlier revoked by the undersigned in a signed 
writing delivered to the foregoing attorneys-in-fact.
IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed 
as of this 21st day of July, 2011.
 
 
/s/ Stephen E. Frank
Stephen E. Frank
FRANK STEPHEN E 4
