Mr. I. Jon Brumley is Chairman of the Board of Encore Acquisition Company., since its inception in April 1998. Mr. Brumley also serves as the Chairman of the Board of Encore Energy Partners GP LLC, the general partner of Encore Energy Partners LP, a position he has held since its inception in February 2007. Mr. Brumley served as EAC’s Chief Executive Officer from inception until January 2006 and President from inception until August 2002. Beginning in August 1996, Mr. Brumley served as Chairman and Chief Executive Officer of MESA Petroleum (an independent oil and natural gas company) until its merger in August 1997 with Parker & Parsley to form Pioneer Natural Resources Company (an independent oil and natural gas company). He served as Chairman and Chief Executive Officer of Pioneer until joining EAC in 1998. Mr. Brumley has also served as Chairman of XTO Energy, Inc. and President and Chief Executive Officer of Southland Royalty Company. Mr. Brumley received a Bachelor of Business Administration from the University of Texas and a Master of Business Administration from the University of Pennsylvania Wharton School of Business.

Mr. Jon S. Brumley is Chief Executive Officer of Encore Acquisition Company., since January 2006, President of EAC since August 2002, and a director of EAC since November 2001. Mr. Brumley also serves as the Chief Executive Officer, President, and director of Encore Energy Partners GP LLC since February 2007. He also held the positions of Executive Vice President — Business Development and Corporate Secretary of EAC from its inception in April 1998 until August 2002 and was a director of EAC from April 1999 until May 2001. Prior to joining EAC, Mr. Brumley held the position of Manager of Commodity Risk and Commercial Projects for Pioneer Natural Resources Company. He was with Pioneer since its creation by the merger of MESA and Parker & Parsley in August 1997. Prior to August 1997, Mr. Brumley served as Director — Business Development for MESA. Mr. Brumley received a Bachelor of Business Administration in Marketing from the University of Texas.

Mr. Robert C. Reeves is Senior Vice President, Chief Financial Officer, Corporate Secretary and Treasurer of Encore Acquisition Company, since November 2006 and has been Corporate Secretary of EAC since May 2008. Mr. Reeves has also served as Senior Vice President, Chief Financial Officer, and Treasurer of Encore Energy Partners GP LLC since February 2007 and as Corporate Secretary since May 2008. From November 2006 until January 2007, Mr. Reeves also served as Corporate Secretary of EAC. Mr. Reeves served as Senior Vice President, Chief Accounting Officer, Controller, and Assistant Corporate Secretary of EAC from November 2005 until November 2006. He served as EAC’s Vice President, Controller, and Assistant Corporate Secretary from August 2000 until October 2005. He served as Assistant Controller of EAC from April 1999 until August 2000. Prior to joining EAC, Mr. Reeves served as Assistant Controller for Hugoton Energy Corporation. Mr. Reeves received his Bachelor of Science in Accounting from the University of Kansas. He is a Certified Public Accountant.

Mr. L. Ben Nivens is Senior Vice President and Chief Operating Officer of Encore Acquisition Company, since November 2006. Mr. Nivens has also served as Senior Vice President and Chief Operating Officer of Encore Energy Partners GP LLC since its inception in February 2007. From November 2005 until November 2006, Mr. Nivens served as EAC’s Senior Vice President, Chief Financial Officer, Treasurer and Corporate Secretary. Mr. Nivens served as EAC’s Vice President of Corporate Strategy and Treasurer from June 2005 until October 2005. From April 2002 to June 2005, Mr. Nivens served as EAC’s Engineering Manager. Prior to joining EAC, he worked as a reservoir engineer for Prize Energy from 1999 to 2002. From 1990 to 1999, Mr. Nivens worked in the corporate planning group at Union Pacific Resources and also served as a reservoir engineer. In addition, he worked as a reservoir engineer for Compass Bank in 1999. Mr. Nivens received a Bachelor of Science in Petroleum Engineering from Texas Tech University and a Masters of Business Administration from Southern Methodist University.

Mr. John W. Arms is Senior Vice President — Acquisitions of Encore Acquisitons Company, since February 2007. Mr. Arms served as Vice President of Business Development from September 2001 until February 2007. From November 1998 until September 2001, Mr. Arms served in various petroleum engineering positions for Encore. Prior to joining Encore in November 1998, Mr. Arms was a Senior Reservoir Engineer for Union Pacific Resources and an Engineer at XTO Energy, Inc. Mr. Arms received a Bachelor of Science in Petroleum Engineering from the Colorado School of Mines.

Mr. N. Kevin Treadway is Senior Vice President, Land of EAC since February 2008. and From April 2003 to February 2008, Mr. Treadway served as Vice President, Land. Mr. Treadway has also served as Senior Vice President, Land of Encore Energy Partners GP LLC since February 2008 and served as its Vice President, Land from February 2007 to February 2008. From 2002 until April 2003, Mr. Treadway was EAC’s Land Manager. Mr. Treadway joined EAC in 2000 as a staff landman. Prior to joining EAC, Mr. Treadway served as a Landman at Coho Resources. Mr. Treadway received a Bachelor of Science degree in Petroleum Land Management from the University of Southwestern Louisiana

Ms. Andrea Hunter is Vice President, Controller and Principal Accounting Officer of EAC since February 2008. Ms. Hunter has also served as Vice President, Controller and Principal Accounting Officer of Encore Energy Partners GP LLC since February 2008. Prior to her promotion, Ms. Hunter had served as Controller of EAC and Encore Energy Partners GP LLC since September 2007. From July 2003 to September 2007, Ms. Hunter held positions of increasing responsibility at EAC, including financial reporting senior manager. Prior to joining EAC in July 2003, Ms. Hunter worked in public accounting, first in the Assurance and Business Advisory Services of PricewaterhouseCoopers LLP and later as an editor at Thomson Publishing’s Practitioners Publishing Company. Ms. Hunter received a Master of Science and Bachelor of Business Administration, both in Accounting, from the University of Texas at Arlington. She is a Certified Public Accountant.

Mr. Andy R. Lowe is Vice President, Marketing of Encore Acquisition Company, since February 2007. Mr. Lowe has also served as Vice President, Marketing of Encore Energy Partners GP LLC since February 2008. From May 2006 until February 2007, Mr. Lowe was EAC’s Director of Marketing. Prior to joining EAC, Mr. Lowe was Vice President — Marketing for Vintage Petroleum, Inc. from December 1997 until December 2005. Mr. Lowe served as General Manager — Marketing for Vintage Petroleum, Inc. from 1992 until December 1997. Mr. Lowe served as president of Quasar Energy, Inc. from 1990 until 1992, and Manager — Marketing, as well as various other management capacities, for Maxus Energy Corporation, formerly Diamond Shamrock Exploration Company, from 1983 until 1990. Mr. Lowe received a Bachelor of Science degree in Education from Texas Tech University.

Mr. Thomas H. Olle is Vice President, Strategic Solutions of Encore Acquisition Company, since February 2008. From November 2006 to February 2008, Mr. Olle served as Vice President, Mid-Continent Region. Mr. Olle has also served as a Vice President of Encore Energy Partners GP LLC since February 2007. From February 2005 until November 2006, Mr. Olle was EAC’s Senior Vice President — Asset Management. Mr. Olle served as EAC’s Senior Vice President, Asset Management of the Cedar Creek Anticline from April 2003 to February 2005. Mr. Olle joined EAC in March 2002 as Vice President of Engineering. Prior to joining EAC, Mr. Olle served as Senior Engineering Advisor of Burlington Resources, Inc. (an independent oil and gas company) from September 1999 to March 2002. From July 1986 to September 1999, he served as a Regional Engineer of Burlington Resources. Mr. Olle received a Bachelor of Science degree with Highest Honors in Mechanical Engineering from the University of Texas at Austin.

Mr. Ted Collins, Jr. is Director of Encore Acquisition Company, since May 2001. From 1988 to July 2000, he was a co-founder and president of Collins & Ware, Inc. (an independent oil and natural gas exploration company which was sold in July 2000). Since that time he has engaged in private oil and natural gas investments. Mr. Collins is a past President of the Permian Basin Petroleum Association, the Permian Basin Landmen’s Association and the Midland Petroleum Club. He currently serves as Chairman of the Midland Wildcat Committee. He is a graduate of the University of Oklahoma with a Bachelor of Science in Geological Engineering. Mr. Collins serves on the Board of Directors of the general partner of Energy Transfer Partners, L.P.

Mr. Ted A. Gardner is Director of Encore Acquisition Company, since May 2001. Mr. Gardner has been Managing Partner of Silverhawk Capital Partners (a private equity investment group) since June 2005. From June 2003 to June 2005, Mr. Gardner was an independent investor. Mr. Gardner was a Managing Partner of Wachovia Capital Partners (a private equity investment group) and a Senior Vice President of Wachovia Corporation (a provider of commercial and retail banking and trust services) from 1990 until 2003. Mr. Gardner received a Bachelor of Arts degree in Economics from Duke University and a Juris Doctor and Masters of Business Administration from the University of Virginia.

Mr. James A. Winne III is Director of Encore Acquisition Company. He was a director of EAC since May 2001 to July 2008. He has been President and Chief Executive Officer of Legend Natural Gas II, L.P. (an independent oil and natural gas company) since September 2004 and President and Chief Executive Officer of Legend Natural Gas III, L.P. (an independent oil and natural gas company) since August 2006. Mr. Winne is also non-executive Chairman of the Board of Phoenix Exploration Company, a privately held oil and natural gas exploration company. Mr. Winne was President and Chief Executive Officer of Legend Natural Gas, L.P. (an independent oil and natural gas company) from September 2001 until August 2004. Mr. Winne was a director of Belden & Blake Corporation (an independent oil and natural gas company) from September 2004 until August 2005 and served as Chairman of the Board and Chief Executive Officer of Belden & Blake from December 2004 until August 2005. From March 2001 until September 2001, Mr. Winne developed plans for a business that became Legend Natural Gas. He was formerly employed by North Central Oil Corporation (an independent oil and natural gas company) for 18 years and was President and Chief Executive Officer from September 1993 until March 2001. After attending the University of Houston, he started his career as an independent landman and also worked at Tomlinson Interest, Inc. (an independent oil and natural gas company) and Longhorn Oil and Gas (an independent oil and natural gas company) before joining North Central’s land department in January 1983. Mr. Winne has 28 years of experience in the oil and gas industry.

Mr. Martin C. Bowen is Director of Encore Acquisition Company, since May 2004. Since 1993, Mr. Bowen has been Vice President and Chief Financial Officer of Fine Line, a private holding company. He also serves on the Board of Directors of AZZ, Inc. and several privately held companies. In addition, he is a Director and Executive Committee Member of the Southwestern Exposition and Livestock Show and President and Chief Executive Officer of Performing Arts Fort Worth. Mr. Bowen received a Bachelor of Business Administration in Finance from Texas A&M University, a Bachelor of Foreign Trade from the American Graduate School of International Management and a J.D. from Baylor University School of Law.

Mr. John V. Genova is Director of Encore Acquisition Company, since May 2004. Mr. Genova has been Vice President of Corporate Planning for Tesoro Corporation (an independent petroleum refiner) since March 2006. From July 2005 to March 2006, Mr. Genova was Vice President of Performance Management for Tesoro Corporation. He also has been serving as an energy advisor for the Gerson Lehrman Group since 2004 and as a Senior Energy Advisor to Chanin Capital Partners since early 2005. From January 2005 to July 2005, Mr. Genova was an independent consultant to the energy industry. Previously, Mr. Genova was Executive Vice President — Refining and Marketing of Holly Corporation (an independent U.S. petroleum refiner) from January 2004 to December 2004. Prior to Holly, Mr. Genova worked over 27 years with ExxonMobil. From January 1999 to December 1999, he served as Vice President of the Gas Department of Exxon Company, International. From December 1999 to March 2002, he served as Director of International Gas Marketing of ExxonMobil International Limited in London. From April 2002 through 2003, Mr. Genova served as Executive Assistant to the Chairman and General Manager, Corporate Planning of ExxonMobil Corporation. Mr. Genova received a Bachelor of Science degree in Chemical and Petroleum Refining Engineering from the Colorado School of Mines.

Mr. John A. Bailey is Director of Encore Acquisition Company., since May 2006. Mr. Bailey has been the Managing Partner of 1859 Partners LLC, an investment partnership, since March 2009. From August 2008 to March 2009, Mr. Bailey was the Managing Partner of J. Bailey & Co LLC, an industry consultancy, and actively involved in the formation of 1859 Partners LLC. From December 2006 until August 2008, Mr. Bailey was a Portfolio Manager, Global Energy, at Carlyle — Blue Wave Partners Management, LP. From March 2005 to October 2006, Mr. Bailey was employed as Vice President, Energy at Amaranth Group LLC and a consultant to Amaranth Group LLC from October 2004 until March 2005. From October 2000 until August 2004, Mr. Bailey was an equity research analyst and Vice President of Equity Research for Deutsche Bank Securities with a focus on the North American exploration and production segment of the energy industry. From May 1997 until May 2000, Mr. Bailey was part of the oil and natural gas equity research group at Donaldson, Lufkin & Jenrette, Inc. Mr. Bailey received a Bachelor of Arts degree in Economics and Government from Cornell University.