POWER OF ATTORNEY


	Know all by these presents, that the undersigned hereby constitutes and appoints each of Charles A. Berardesco, Sean J. Klein and Constance F. Smith, signing singly, the undersigneds true and lawful attorney-in-fact to:  (1) execute for and on behalf of the undersigned, in the undersigneds capacity as an officer and/or director of Constellation Energy Group, Inc. (the "Company"), Forms 3, 4, and 5 in accordance with Section 16(a) of the Securities Exchange Act of 1934 and the rules thereunder, Form  144 in accordance with Rule 144 promulgated under the Securities Act of 1933 and Form ID, or any successor forms thereto;

(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, or Form 144, or Form ID and timely file such forms 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- facts 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 for 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-facts 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 undersigneds responsibilities to comply with Section 16 of the Securities Exchange
Act of 1934 or Rule 144 promulgated under the Securities Act of 1933.

       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 undersigneds 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 22nd day of October 2010.


       						   /s/ Samuel Minzberg
       							   Signature


       							Samuel Minzberg
       							  Print Name
S:\Legal\Corp\SharonH\samuelminzberg