Exhibit 24

POWER OF ATTORNEY


KNOW ALL PERSONS BY THESE PRESENTS, that each of the several undersigned officers and directors whose signatures appear below, hereby makes, constitutes and appoints Ross E. Jeffries, Jr., Lauren A. Mogensen and Gary G. Lynch, and each of them acting individually, its, his or her true and lawful attorneys with power to act without any other and with full power of substitution, to prepare, execute, deliver and file in its, his or her name and on its, his or her behalf, and in each of the undersigned officer's and director's capacity or capacities as shown below, an Annual Report on Form 10-K for the year ended December 31, 2012, and all exhibits thereto and all documents in support thereof or supplemental thereto, and any and all amendments or supplements to the foregoing, hereby ratifying and confirming all acts and things which said attorneys or attorney might do or cause to be done by virtue hereof.

IN WITNESS WHEREOF, each of the undersigned officers and directors, in the capacity or capacities noted, has hereunto set his or her hand as of the date indicated below.

 
 
 






Signature
 
Title
Date
 
 
 
 
/s/ Bruce R. Thompson
 
Chief Financial Officer
February 28, 2013
Bruce R. Thompson
 
(Principal Financial Officer)
 
 
 
 
 
/s/ Neil A. Cotty
 
Chief Accounting Officer
February 28, 2013
Neil A. Cotty
 
(Principal Accounting Officer)
 
 
 
 
 
/s/ Sharon L. Allen
 
Director
February 27, 2013
Sharon L. Allen
 
 
 
 
 
 
 
/s/ Mukesh D. Ambani
 
Director
February 23, 2013
Mukesh D. Ambani
 
 
 
 
 
 
 
/s/ Susan S. Bies
 
Director
February 28, 2013
Susan S. Bies
 
 
 
 
 
 
 
/s/ Jack O. Bovender, Jr.
 
Director
February 20, 2013
Jack O. Bovender, Jr.
 
 
 
 
 
 
 
/s/ Frank P. Bramble, Sr.
 
Director
February 27, 2013
Frank P. Bramble, Sr.
 
 
 
 
 
 
 
/s/ Virgis W. Colbert
 
Director
February 28, 2013
Virgis W. Colbert
 
 
 
 
 
 
 
/s/ Charles K. Gifford
 
Director
February 22, 2013
Charles K. Gifford
 
 
 
 
 
 
 
/s/ Charles O. Holliday, Jr.
 
Director
February 28, 2013
Charles O. Holliday, Jr.
 
 
 
 
 
 
 
/s/ Linda P. Hudson
 
Director
February 15, 2013
Linda P. Hudson
 
 
 
 
 
 
 
/s/ Monica C. Lozano
 
Director
February 21, 2013
Monica C. Lozano
 
 
 
 
 
 
 
/s/ Thomas J. May
 
Director
February 26, 2013
Thomas J. May
 
 
 
 
 
 
 
/s/ Donald E. Powell
 
Director
February 28, 2013
Donald E. Powell
 
 
 
 
 
 
 
/s/ Charles O. Rossotti
 
Director
February 28, 2013
Charles O. Rossotti
 
 
 
 
 
 
 




Signature
 
Title
Date
 
 
 
 
/s/ Robert W. Scully
 
Director
February 27, 2013
Robert W. Scully
 
 
 
 
 
 
 
/s/ R. David Yost
 
Director
February 20, 2013
R. David Yost