<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>bienstock.txt
<DESCRIPTION>POWER OF ATTORNEY
<TEXT>
POWER OF ATTORNEY

I, GREGG L. BIENSTOCK, do hereby nominate, constitute and appoint each of
Kevin J. Doyle, Anne Gill Kelly and Patricia LoCascio as my true and
lawful agent and attorney-in-fact, with full power and authority to act
hereunder, in his or her discretion, in my name and on my behalf as fully
as I could if I were present and acting in person, to make any and all
required or voluntary filings under Section 16(a) of the Securities Exchange
Act of 1934, as amended (the "Exchange Act"), and the applicable rules
and regulationsthereunder, with the Securities and Exchange Commission,
the New York StockExchange, Ambac Financial Group, Inc., a Delaware corporation
(the "Company"), and any other person or entity to which such filings may be
required under Section 16(a) of the Exchange Act as a result of my service
as an officer of the Company or beneficial ownership (within the meaning of
Section 16(a) of the Exchange Act) of more than ten percent of any class of
equity securities of the Company.

I hereby consent to, ratify and confirm all that each said attorney-in-fact
shall do or cause to be done by virtue of this Power of Attorney.  I hereby
acknowledge that each attorney-in-fact, in serving in such capacity at my
request, is not assuming, nor is the Company assuming, any of my
responsibilities to comply with Section 16 of the Exchange Act.

This Power of Attorney shall remain in full force and effect from this
date forward for so long as I am an officer or director of the Company
and for such time thereafter as may be necessary to make any such filings or
until revoked or modified by me.  I hereby revoke all prior powers of
attorney relating to the foregoing acts.

IN WITNESS WHEREOF, I have hereunto signed my name this 7th day of
January, 2010.

/s/ Gregg L. Bienstock
GREGG L. BIENSTOCK
</TEXT>
</DOCUMENT>
