Mr. Drummond currently serves as Chairman of the Board, a position he has held since May 2024. He has been a director of the Company since May 2017. Prior to October 2021, he served as a supervisory director of the Company, and thereafter, as a non-executive member of the Board. He currently serves as Vice Chairman of the Board of Directors of Patterson-UTI Energy, Inc., an oilfield services company, a position he has held since September 2023. Prior to serving in his current position, Mr. Drummond was President and Chief Executive Officer of NexTier Energy Solutions Inc., f.k.a. Keane Group, Inc., an oilfield services company, from August 2018 until its merger with Patterson-UTI in September 2023. He also served on the Board of Directors of NexTier from August 2018 until September 2023. Prior to that, Mr. Drummond served as President and Chief Executive Officer of Key Energy Services, Inc., an oilfield services company, from March 2016 to May 2018, prior to which he was President and Chief Operating Officer since June 2015. He also served on the Board of Directors of Key Energy Services, Inc. from November 2015 until August 2018. Prior to joining Key, Mr. Drummond was previously employed for 31 years by Schlumberger Limited, where he served in multiple engineering, marketing, operations, and leadership positions throughout North America. His positions at Schlumberger included President of North America from January 2011 to June 2015; President of North America Offshore & Alaska from May 2010 to December 2010; Vice President and General Manager for the US Gulf of Mexico from May 2009 to May 2010; Vice President of Global Sales from July 2007 to April 2009; Vice President and General Manager for US Land from February 2004 to June 2007; Wireline Operations Manager from October 2003 to January 2004; Vice President and General Manager for Atlantic and Eastern Canada from July 2000 to September 2003; and Oilfield Services Sales Manager from January 1998 to June 2000. Mr. Drummond began his career in 1984 with Schlumberger. Mr. Drummond is a member of the Society of Petroleum Engineers. Formerly, he served as a member of the Board of Directors of the National Ocean Industries Association, the Energy Workforce & Technology Council and the Greater Houston Partnership and on the Board of Trustees for the Hibernia Platform Employees Organization Newfoundland; and as an advisory board member for each of the University of Alabama College of Engineering Board, University of Houston Global Energy Management Institute, the Texas Tech University Petroleum Engineers and Memorial University s Oil and Gas Development Partnership. Mr. Drummond received his Bachelor of Science in Mineral/Petroleum Engineering from the University of Alabama in 1983. Mr. Drummond was selected as a director because of his extensive industry and management expertise.