Curtis W. Huff — Mr. Huff has served as Chairman of the Board of Patterson-UTI since June 2020, as a director of Patterson-UTI since May 2001 and served as a director of UTI Energy Corp. ("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 co-founded Intervale Capital, an oilfield service private equity firm, in 2006 and served as a Managing Director from 2006 to 2012, when he sold his interest in the firm. 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 also serves as a director at various of Freebird’s portfolio 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 the Chairman of the Board of Directors of the University of St. Thomas in Houston, Texas and is actively involved with various charities, including the Houston Food Bank.