Officers

Mark S. Siegel, Chairman, Patterson-UTI Energy, Inc.; President, Remy Investors and Consultants Inc.

Mark S. Siegel has served as Chairman of the Board and as a director of Patterson-UTI since May 2001. Mr. Siegel previously served as Chairman of the Board and as a director of UTI Energy from 1995 to 2001, when Patterson Energy and UTI Energy merged to form Patterson-UTI. Mr. Siegel has been President of REMY Investors and Consultants Inc. since 1993. Mr. Siegel is the past chairman and a current member of the Board of Directors of the Cedars-Sinai Medical Center, and previously served on the Board of Trustees of the J. Paul Getty Trust from 2005 to 2017 (including as Chair from 2010 to 2015). From 1992 to 1993, Mr. Siegel was President of the Music Division at Blockbuster Entertainment Corp. From 1988 through 1992. Mr. Siegel was an Executive Vice President of Shamrock Holdings Inc., a private investment company, and Managing Director of Shamrock Capital Advisors Inc. Mr. Siegel received a Bachelor of Arts degree from Colgate University (Magna Cum Laude and Phi Beta Kappa) and a Juris Doctor from University of California, Berkeley (Boalt Hall) School of Law (Order of the Coif).

William A. (Andy) Hendricks, Jr., President and Chief Executive Officer, Patterson-UTI Energy, Inc.

William A. (Andy) Hendricks has served as President and Chief Executive Officer of Patterson-UTI since October 2012 and as a director of Patterson-UTI since June 2017. From April 2012 to September 2012, he served as Chief Operating Officer of Patterson-UTI. From 1998 to 2012. Mr. Hendricks provided his leadership and guidance to Schlumberger in various roles around the world, including serving in numerous executive positions since 2003 and serving as President of Schlumberger Drilling and Measurements from May 2010 to March 2012. Mr. Hendricks received a Bachelor of Science in Petroleum Engineering from Texas A&M University.

C. Andrew Smith, Executive Vice President and Chief Financial Officer

Mr. Smith has served as Executive Vice President and Chief Financial Officer since September 2017. From April 2014 until September 2017, Mr. Smith served as Executive Vice President and Chief Financial Officer of Kirby Corporation, a marine transportation and diesel engine services company. Mr. Smith served as Executive Vice President – Finance of Kirby Corporation from January 2014 to April 2014. Prior to joining Kirby Corporation, Mr. Smith served as Senior Vice President and Chief Financial Officer of Benthic Geotech and was previously Chief Financial Officer for both Global Industries, LTD and NATCO Group. Mr. Smith is a Certified Public Accountant and holds a degree in business administration from the University of Houston.

Kenneth N. Berns, Executive Vice President and Chief Commercial Officer

Mr. Berns has served as Executive Vice President and Chief Commercial Officer of Patterson-UTI since May 2017. Berns served as Senior Vice President of Patterson-UTI from April 2003 to May 2017 and as a director of Patterson-UTI from May 2001 to June 2017. Mr. Berns served as a director of UTI Energy from 1995 to May 2001. Mr. Berns has been an executive with REMY Investors and Consultants, Inc. since 1994. Mr. Berns holds a Bachelor of Science in Business Administration from San Diego State University and a Master of Science in Taxation from Golden Gate University.

Seth D. Wexler, Senior Vice President, General Counsel and Secretary

Mr. Wexler has served as Senior Vice President, General Counsel and Secretary of Patterson-UTI since February 2017. Mr. Wexler served as General Counsel and Secretary of Patterson-UTI from August 2009 to February 2017. From March 1998 to August 2009, he specialized in securities law and mergers and acquisitions for the law firm of Norton Rose Fulbright US LLP, including acting as a partner since January 2007. Mr. Wexler received a Bachelor of Business Administration in Finance from the University of Texas at Austin, a Juris Doctor from the University of Houston Law Center and a Master of Business Administration from the University of Houston.

Board of Directors

Charles O. Buckner, Retired Partner, Ernst & Young LLP

Mr. Buckner has served as a director of Patterson-UTI since February 2007. Mr. Buckner, a private investor, retired from the public accounting firm of Ernst & Young LLP in 2002 after 35 years of service in a variety of client service and administrative roles, including chairmanship of Ernst & Young’s U.S. energy practice. Mr. Buckner served as a director for KLR Energy Acquisition Corp., a blank check company formed to source, acquire and, after its initial business combination, build an oil and gas exploration and production business, from March 2016 to April 2017. Mr. Buckner served as a director of Energy Partners, Ltd., a publicly held company with oil and natural gas exploration and production on the continental shelf in the Gulf of Mexico from 2009 to 2014, Global Industries, Ltd., a marine construction services company with global operations from 2010 to 2011, Gateway Energy Corporation, a publicly held oil and gas pipeline company from 2008 to 2010, Horizon Offshore, Incorporated, a marine construction services company for the offshore oil and gas industry from 2003 to 2007, and Whittier Energy Corporation, a publicly held company with domestic onshore oil and natural gas exploration and production from 2003 to 2007. Mr. Buckner is a Certified Public Accountant and holds a Bachelor of Business Administration from the University of Texas and a Masters of Business Administration from the University of Houston.

Tiffany (TJ) Thom Cepak, Chief Financial Officer, Energy XXI Gulf Coast, Inc.

Ms. Cepak has served as a director of Patterson-UTI since August 2014. Ms. Cepak has served as the Chief Financial Officer of Energy XXI Gulf Coast Inc. since August 2017. Ms. Cepak served as the Chief Financial Officer of KLR Energy Acquisition Corp. (and, subsequent to its business combination, Rosehill Resources Inc.) from January 2015 to June 2017. Ms. Cepak served as a director of Yates Petroleum Corporation, a privately owned, independent oil and gas exploration and production company, from October 2015 to October 2016. Ms. Cepak served four years as the Chief Financial Officer of EPL Oil & Gas, Inc., and was further appointed Executive Vice President in January 2014, and she served in those roles until June 2014, when EPL was sold. Ms. Cepak began her career with EPL as a Senior Asset Management Engineer, a position she held until she was appointed Director of Corporate Reserves in September 2001. Ms. Cepak was named EPL’s Director of Investor Relations in April 2006 and Vice President, Treasurer and Investor Relations in July 2008. In July 2009. Ms. Cepak was designated as EPL’s Principal Financial Officer and, in September 2009, she was appointed Senior Vice President. Ms. Cepak has more than 20 years of energy industry experience and prior to joining EPL, she was a Senior Reservoir Engineer with Exxon Production Company and ExxonMobil Company with operational roles including reservoir engineering and subsurface completion engineering for numerous offshore Gulf of Mexico properties. Ms. Cepak holds a B.S. in Engineering from the University of Illinois and a Masters of Business Administration in Management with a concentration in Finance from Tulane University.

Michael W. Conlon, Retired Partner, Norton Rose Fulbright US LLP

Mr. Conlon has served as a director of Patterson-UTI since September 2012. Mr. Conlon retired as a partner of the law firm, Norton Rose Fulbright US LLP, in January 2012 after 40 years with the firm. Mr. Conlon specialized in corporate, securities and merger and acquisition matters. Mr. Conlon was partner-in-charge of the firm’s Houston office from 2007 to 2011, was co-partner-in-charge from 2001 to 2007 and partner-in-charge of its Washington, D.C. office from 1992 to 1998. Mr. Conlon currently is an Advisory Director to Tailored Brands, Inc., a specialty retailer of men’s apparel and international supplier of corporatewear, and an NYSE listed company. Mr. Conlon holds a Bachelor of Arts degree in Economics from Catholic University of America, where he graduated magna cum laude and as a member of Phi Beta Kappa, and a Juris Doctorate from the Duke University School of Law, where he graduated as a member of the Order of the Coif.

Curtis W. Huff, Chairman, Freebird Partners

Mr. Huff has served as a director of Patterson-UTI since May 2001 and served as a director of UTI from 1997 to May 2001. Mr. Huff is owner and Chairman of Freebird Partners, a private investment firm created in 2002 that is focused on oilfield service companies and technology. Mr. Huff was Managing Director of Intervale Capital, an oilfield service private equity firm that Mr. Huff co-founded in 2006, and he was a senior advisor to that firm from 2012 to February 2015. Mr. Huff also serves as Chairman of Impact Fluid Solutions LP, which provides drilling and production solutions for oil and gas operators and fluid companies. Mr. Huff served as the President and Chief Executive Officer of Grant Prideco, Inc., a provider of drill pipe and other drill stem products, from February 2001 to June 2002. From January 2000 to February 2001, Mr. Huff served as Executive Vice President, Chief Financial Officer and General Counsel of Weatherford International, Inc., one of the world’s largest international oilfield services companies. He served as Senior Vice President and General Counsel of Weatherford from May 1998 to January 2000. Mr. Huff began his professional career in 1983 with the law firm of Norton Rose Fulbright US LLP where he specialized in corporate, securities and merger and acquisition matters. Mr. Huff was made a partner in that firm in 1989 where he served until 1998 when he joined Weatherford. Mr. Huff holds a Bachelor of Arts degree and J.D. from the University of New Mexico, where he graduated as a member of the Order of the Coif and cum laude, and a Masters of Law from New York University School of Law. Mr. Huff is a Vice Chairman of the Board of Directors of the University of St. Thomas in Houston, Texas, and a member of the board of directors of the Houston Food Bank.

Terry H. Hunt, Energy Consultant

Mr. Hunt has served as a director of Patterson-UTI since April 2003 and served as a director of UTI from 1994 to May 2001. Mr. Hunt is an energy consultant and retired senior natural gas and electric utility executive. Mr. Hunt served as Senior Vice President — Strategic Planning of PPL Corporation, an international energy and utility holding company, from 1998 to 2000. Mr. Hunt served as the President and Chief Executive Officer of Penn Fuel Gas, Inc., a Pennsylvania-based natural gas and propane distribution company, from 1992 to 1999. Previously, Mr. Hunt was President of Carnegie Natural Gas and Apollo Gas Company, both Appalachian natural gas distribution companies. He also previously served in senior management positions in natural gas project and venture development, oil and natural gas exploration and development evaluation and operations and major production facilities construction with Texas Oil & Gas Corp. and Atlantic Richfield. Mr. Hunt holds a Bachelor of Engineering degree from the University of Saskatchewan, Canada and a Masters of Business Administration from Southern Methodist University.

Janeen S. Judah, Retired, Chevron Management

Ms. Judah has served as a director of Patterson-UTI since April 2018. Ms. Judah served as the President of the Society of Petroleum Engineers from September 2016 to October 2017 while on secondment from Chevron, and as a member of the Board of Directors of the Society of Petroleum Engineers from 2003 to 2006 and from 2012 to 2018. Ms. Judah held numerous leadership positions at Chevron, including general manager for Chevron’s Southern Africa business unit from August 2010 to September 2016, president of Chevron Environmental Management Company from August 2007 to August 2010 and general manager of reservoir and production engineering for Chevron Energy Technology Company from June 2004 to August 2007. Before joining Chevron in 1998, she held various upstream petroleum engineering positions for Texaco and Arco, starting in Midland in 1981. Ms. Judah holds Bachelor of Science and Masters of Science degrees in petroleum engineering from Texas A&M University, a Masters of Business Administration from the University of Texas of the Permian Basin and a Juris Doctorate from the University of Houston Law Center.

Mark S. Siegel, Chairman, Patterson-UTI Energy, Inc.; President, Remy Investors and Consultants, Inc.

Mark S. Siegel has served as Chairman of the Board and as a director of Patterson-UTI since May 2001. Mr. Siegel previously served as Chairman of the Board and as a director of UTI Energy from 1995 to 2001, when Patterson Energy and UTI Energy merged to form Patterson-UTI. Mr. Siegel has been President of REMY Investors and Consultants Inc. since 1993. Mr. Siegel is the past chairman and a current member of the Board of Directors of the Cedars-Sinai Medical Center, and previously served on the Board of Trustees of the J. Paul Getty Trust from 2005 to 2017 (including as Chair from 2010 to 2015). From 1992 to 1993, Mr. Siegel was President of the Music Division at Blockbuster Entertainment Corp. From 1988 through 1992. Mr. Siegel was an Executive Vice President of Shamrock Holdings Inc., a private investment company, and Managing Director of Shamrock Capital Advisors Inc. Mr. Siegel received a Bachelor of Arts degree from Colgate University (Magna Cum Laude and Phi Beta Kappa) and a Juris Doctor from University of California, Berkeley (Boalt Hall) School of Law (Order of the Coif).

William A. (Andy) Hendricks, Jr., President and Chief Executive Officer, Patterson-UTI Energy, Inc.

William A. (Andy) Hendricks has served as President and Chief Executive Officer of Patterson-UTI since October 2012 and as a director of Patterson-UTI since June 2017. From April 2012 to September 2012, he served as Chief Operating Officer of Patterson-UTI. From 1998 to 2012. Mr. Hendricks provided his leadership and guidance to Schlumberger in various roles around the world, including serving in numerous executive positions since 2003 and serving as President of Schlumberger Drilling and Measurements from May 2010 to March 2012. Mr. Hendricks received a Bachelor of Science in Petroleum Engineering from Texas A&M University.