Corporate Governance

Prior to his retirement in 2004, Mr. Thompson was Group President, Caterpillar Inc., Peoria, Illinois, a leading manufacturer of construction and mining equipment, diesel and natural gas engines and industrial gas turbines. Mr. Thompson also is a director of Gardner Denver, Inc. and Lead Director of Lennox International, Inc.

Since May, 2004, Mr. Abdoo has been President of R.A. Abdoo & Co. LLC, Milwaukee, Wisconsin, an environmental and energy consulting firm. Prior thereto Mr. Abdoo was Chairman and Chief Executive Officer of Wisconsin Energy Corporation from 1991 until his retirement in April, 2004. He also served as President of Wisconsin Energy Corporation from 1991 to April 2003. Mr. Abdoo is a director of A.K. Steel Corporation and ZBB Energy Corporation.

Dr. Candris was President and Chief Executive Officer of Westinghouse from July 2008 until his retirement on March 31, 2012. During his 36 years of service at Westinghouse Electric Company, Pittsburgh, Pennsylvania, a unit of Tokyo-based Toshiba Corp. from July 2008 until his retirement on March 31, 2012. During his 36 years of service at Westinghouse, Dr. Candris served in various positions, including Senior Vice President, Nuclear Fuel from September 2006 to July 2008. Dr. Candirs is also a director of Kurion, Inc.

From October 2008 until his retirement in January 2011, Mr. Cornelius served as Senior Vice President, Finance and Chief Financial Officer of ConocoPhillips, Houston, Texas, an integrated energy company. During his 30 year tenure at ConocoPhillips, Mr. Cornelius served in various positions, including Senior Vice President, Planning, Strategy and Corporate Affairs from September, 2007 to October 2008; Regional President, Exploration & Production-Lower 48 from 2006 to September 2007; and President, Global Gas from 2004 to 2006. Mr. Cornelius served on the board of DCP Midstream L.P. from 2007 to 2008 and is also a director of USEC, Inc., Carbo Ceramics Inc., Western Refining, Inc. and Parallel Energy Trust.

Since November 2007, Mr. Jesanis has been a principal with Serrafix, Boston, Massachusetts, a firm providing energy efficiency consulting and implementation services, principally to municipalities. From July 2004 through December 2006, Mr. Jesanis was President and Chief Executive Officer of National Grid USA, a natural gas and electric utility, and a subsidiary of National Grid plc, of which Mr. Jesanis was also an Executive Director. Prior to that, Mr. Jesanis was Chief Operating Officer of National Grid USA from January 2001 to July 2004. Mr. Jesanis is a director of Ameresco, Inc.

In February 2011, Mr. Kittrell retired as Executive Vice President & Chief Financial Officer of Dresser, Inc., ("Dresser") Addison, Texas, after serving in that capacity since December 2007. Dresser, a worldwide leader in providing highly engineered products for the global energy industry was aquired by General Electric in February 2011. Prior to joining Dresser, Mr. Kittrell was Executive Vice President and Chief Financial Officer of Andrew Corporation from October 2003 to December 2007. Mr. Kittrell is also a director of On Assignment, Inc.

Prior to his retirement in 2007, Mr. Nutter was Chairman, President and Chief Executive Officer of Rayonier, Inc., Jacksonville, Florida, a leading supplier of high performance specialty cellulose fibers and owner of timberlands and other higher value land holdings. Mr. Nutter was a director of Rayonier, Inc. from 1996 to 2009. He is also a director of Republic Services Inc., and the non-executive Chairman of J.M. Huber Corporation. He is also a member of the Advisory Board at the University of Washington Foster School of Business.

Ms. Parker has joined Alstom Power, a segment of Alstom, in April 2011 and is currently serving as Senior Vice President, Quality and Environmental, Health and Safety. Alstom Power is a global leader in power generation located in Zurich, Switzerland. From April 2008 until April 2011, Ms. Parker was President and Chief Executive Officer of International Business Solutions, Inc. ("IBS"), Washington, D.C., a provider of strategic planning and consulting services to profit and not-for-profit organizations. Before joining IBS, Ms. Parker was Executive Vice President and Chief Operations Officer of the National Urban League from July 2007 through April 2008. Prior thereto, Ms. Parker served in numerous operating positions, including Vice President of Global Quality at Ford Motor Company. During her tenure at Ford, Ms. Parker also served as Chief Executive Officer and Group Managing Director at Ford Motor Company of Southern Africa (Pty) Ltd. From September 2001 to December 2004.

Chief Executive Officer ("CEO") of the Company since July 2005. President of the Company since October 2004. Prior thereto Mr. Skaggs served as Executive Vice President, Regulated Revenue from October 2003 to October 2004, President of Columbia Gas of Ohio, Inc. from February 1997 to October 2003; President of Columbia Gas of Kentucky, Inc. from January 1997 to October 2003; President of Bay State Gas Company and Northern Utilities from November 2000 to October 2003; and President of Columbia Gas of Virginia, Inc., Columbia Gas of Maryland, Inc. and Columbia Gas of Pennsylvania, Inc. from December 2001 to October 2003.

Ms. Taylor served as Chief Operating Officer of Qwest Communications, Inc., ("Qwest") Denver, Colorado, from August 2009 to April 2011. Prior thereto, she was Executive Vice President, Business Markets Group from January 2008 to April 2009 and served as Executive Vice President and Chief Administrative Officer from December 2005 to January 2008. Ms. Taylor served in various positions with Qwest and the fomer US West since 1987. Ms. Taylor is also a director of First Interstate BancSystem, Inc.

Since January 2012, Dr. Woo has been President and Chief Executive Officer of Catholic Relief Services, the international humanitarian agency of the catholic community in the United States. Prior thereto, Dr. Woo was Martin J. Gillen Dean and Ray and Milann Siegfried Professor of Entrepreneurial Studies, Mendoza College of Business, University of Notre Dame, Notre Dame, Indiana. Dr. Woo also is a director of AON Corporation and was a director of Circuit City, Inc. until 2009.