Chesapeake Energy Competitors

John, was appointed executive vice president and chief operating officer – North America, effective Jan. 1, 2014, having been region vice president – Permian Region, from 2010 through 2013. He previously served as vice president – Business Development, since January 2004, and production manager for the Gulf Coast Region since April 2003. Prior to that, Christmann held various positions of increasing responsibility in the business development area since joining the company in 1997. Previously, he was employed by Vastar Resources/ARCO Oil and Gas Company in business development, crude oil marketing and engineering assignments. Christmann received his bachelor’s degree in petroleum engineering from the Colorado School of Mines and MBA from Southern Methodist University.

Thad Hill became Calpine’s President and Chief Executive Officer and a member of its Board of Directors in May 2014. Mr. Hill joined the company in September 2008 as Executive Vice President and Chief Commercial Officer. He became Chief Operating Officer in November 2010 and was named President in December 2012. Prior to Calpine, Mr. Hill was with NRG Energy from 2006 to 2008, serving as President of NRG Texas in 2007- 2008. Prior to NRG, Mr. Hill was Executive Vice President of Strategy and Business Development at Texas Genco LP from 2005 to 2006. From 1995 to 2005, he was with Boston Consulting Group Inc., where he rose to Partner and Managing Director and led the North American energy practice, serving companies in the power and gas sector with a focus on commercial and strategic issues. Mr. Hill received his Bachelor of Arts degree from Vanderbilt University magna cum laude and a Master of Business Administration degree from the Amos Tuck School of Dartmouth College, where he was elected an Edward Tuck Scholar.

David John Lesar (born May 30, 1953) is an American businessman who is the former chair of Halliburton Energy Services. He was the CEO of Halliburton for 17 years from 2000 to 2017. Trained as a Certified Public Accountant, Lesar spent 16 years at Arthur Andersen. He had spent most of his career at Andersen, where he worked on their Halliburton account. In 1995, Lesar was hired by Halliburton as a new vice president. July 24, 2019 David Lesar was named the interim CEO of HCSC. June 30, 2020 David Lesar was name the President and CEO of CenterPoint Energy.

Andrew J. Littlefair is president and CEO of Clean Energy, a company he co-founded with T. Boone Pickens in 1997. Previously, Mr. Littlefair served as Vice President of Public Affairs at MESA Inc., then one of America's largest independent producers of natural gas. In this role Littlefair oversaw the company's natural gas vehicle activities and served as special assistant to Mr. Pickens. Mr. Littlefair served as Chairman of NGVAmerica for 8 years from 2003 to 2011. In 2004, he was named an NGV Champion by the International Association of Natural Gas Vehicles (IANGV). In 2014, Mr. Littlefair received an Environmental Leadership Award from the California League of Conservation Voters for his work in renewable natural gas and building America’s Natural Gas Highway. Mr. Littlefair graduated from the University of Southern California with a B.A. in Political Science. He and his wife have two sons.

Ryan Lance is an American businessman. He serves as the chairman and chief executive officer of ConocoPhillips.

Timothy 'Tim' Cawley is a Vice President at Con Edison Transmission, Inc. He has worked as President at ConEdison, Senior VP:Central Operations at ConEdison, and Pres & CEO:Orange & Rockland at ConEdison. Timothy studied at Union Graduate College, Farmers Educational & Cooperative Union of America, and New York University.

He served as Lead Director from the 2016 Annual Meeting through the 2017 Annual Meeting. Mr. Berry served as Executive Vice President, Exploration and Production, of ConocoPhillips Company (“ConocoPhillips”), a major international integrated energy company, from 2003 until his retirement on January 1, 2008. He has over 30 years of experience with ConocoPhillips and Phillips Petroleum Company, which became a part of ConocoPhillips in August 2002. While with these companies, he served at various times in other executive positions including President, Asia Pacific; Senior Vice President of Exploration and Production, Eurasia-Middle East; Vice President of Exploration and Production, Eurasia; and Vice President of International Exploration and Production, New Ventures. While at ConocoPhillips and Phillips Petroleum Company he served in various locations including London, England; Abidjan, Ivory Coast; Stavanger, Norway; Shekou and Beijing, China; and Singapore. Mr. Berry was recognized by the government of China as one of the 31 outstanding foreign experts in 1996. He has served on the board of directors of Franks International since January 2015 and on the board of directors of Oceaneering International, Inc. since June 2016. He served on the board of directors of Nexen Inc. from December 2008 to June 2013, Willbros Group, Inc. (“Willbros”) from February 2008 to May 2014, Access Midstream Partners, L.P. from June 2013 to May 2014, and Teekay Corporation from June 2012 to December 2015. He was the Honorary Consul for Kazakhstan from 2009 until 2014. Mr. Berry holds a bachelor’s and a master’s degree in petroleum engineering from Mississippi State University. Mr. Berry brings extensive domestic and international experience in the oil and gas exploration and production industry and management expertise to the Board. Mr. Berry also brings considerable experience from his position as a director with several other publicly traded companies involved in the energy industry. We believe Mr. Berry’s extensive industry, management and director expertise qualify him to serve on our Board.

Richard E. Muncrief, 62, was appointed to the board of directors and elected president and chief executive officer of the company in January 2021 following Devon’s merger with WPX Energy. Muncrief previously served as chief executive officer and chairman of the board of WPX Energy. He became a member of WPX Energy’s board of directors in 2014. Prior to joining WPX, he served as senior vice president, operations and resource development of Continental Resources, Inc. Muncrief was earlier employed from August 2008 through May 2009 by Resource Production Company where he served as corporate business manager. From September 2007 to August 2008 he served as president, chief operating officer and as a director of Quest Midstream Partners, LP. From 1980 to 2007, he served in various managerial capacities with ConocoPhillips and its predecessor companies, Burlington Resources, Meridian Oil and El Paso Exploration. Muncrief holds a bachelor’s of science in petroleum engineering technology from Oklahoma State University, where he has also been recognized as a distinguished alumnus and is a member of the College of Engineering, Architecture & Technology Hall of Fame. He serves on the board of directors and the executive committee of the American Petroleum Institute, is a past chairman of the American Exploration & Production Council, and also serves on the national advisory board of the Gilcrease Museum.

Lynn J. Good is chairman, president and chief executive officer of Duke Energy, a Fortune 500 company. Good is an Ohio native and graduated from Miami University where she earned a BS in Systems Analysis and in Accounting (1981).