| Phillip A. Gobe |
Phillip A. Gobe is currently the Non-Executive Chairman at ProPetro Holding Corp. and the Lead Non-Executive Director at Scientific Drilling International, Inc. He also serves as a Non-Executive Director at Pioneer Natural Resources GPC, Inc. His former positions include being the Non-Executive Chairman at Pantheon Resources Plc, Director at EPL Oil & Gas, Inc., Independent Director at Pioneer Southwest Energy Partners LP, Independent Non-Executive Director at Pioneer Natural Resources Co., Operations Manager at Atlantic Richfield Co., Inc., Chief Operating Officer at Nuevo Energy Co., and Chief Operating Officer at Vastar Resources, Inc. Mr. Gobe obtained an undergraduate degree from The University of Texas at Austin and an MBA from the University of Louisiana at Lafayette. |
| Samuel D Sledge |
Samuel D Sledge is currently the Chief Executive Officer & Director at ProPetro Holding Corp. Prior to his current position, he obtained an undergraduate degree and an MBA from Baylor University. |
| David S. Schorlemer |
David S. Schorlemer is currently the Director at Performance Multi-Flow Solutions, LLC and the Chief Financial Officer at ProPetro Holding Corp. He previously held positions as Vice President-Marketing & Strategic Planning at Key Energy Services, Inc., Principal at Shell Oil Co., Principal at Tenneco, Inc., Principal at Andersen Consulting LLP (GB), CFO, Secretary, Treasurer & Executive VP at Gulf Island Fabrication, Inc., Chief Financial Officer & Senior Vice President at Basic Energy Services, Inc., Principal at Conoco, Inc., Chief Financial Officer at Q Services, Inc., Project Manager at Accenture Plc, Principal at Petróleos Mexicanos EPE, Chief Financial Officer & Executive Vice President at Stallion Oilfield Services, Inc., Chief Financial Officer & Executive Vice President at Stallion Oilfield Holdings, Ltd., and Chief Financial Officer at Gr Energy Services Management, LP. He holds an MBA from Texas A&M University and an undergraduate degree from The University of Texas at Austin. |
| Celina Davila |
Celina Davila is currently working as the Chief Accounting Officer at ProPetro Holding Corp. She previously worked as a Manager-Accounting at Pioneer Natural Resources Co. Ms. Davila completed her undergraduate degree and MBA from Texas Tech University. |
| Adam Munoz |
Adam Munoz currently works at ProPetro Holding Corp., as President & Chief Operating Officer from 2021. Mr. Munoz also formerly worked at Frac Tech Services LLC, as Vice President. Mr. Munoz received his undergraduate degree from The University of Texas of the Permian Basin. |
| Shelby Fietz |
Shelby Fietz is currently the Chief Commercial Officer at ProPetro Holding Corp. Prior to this role, Ms. Fietz obtained an undergraduate degree from Angelo State University. |
| Spencer D. Armour |
Spencer D. Armour is the founder of Sledge Drilling Holding Corp. (founded in 2005), Sledge Drilling Corp. (founded in 2005), and Lone Star Mud, Inc. (founded in 1986). He held the title of Chief Executive Officer at Sledge Drilling Holding Corp. from 2005 to 2007, Chief Executive Officer at Sledge Drilling Corp. from 2005 to 2006, and President at Lone Star Mud, Inc. from 1986 to 1997. Mr. Armour's current job(s) include being a Director at ProPetro Services, Inc., an Independent Director at Viper Energy, Inc., an Independent Director at CES Energy Solutions Corp., a Director at Viper Energy Partners GP LLC, an Independent Director at ProPetro Holding Corp., and a Partner at Genesis Investments, LLC. Mr. Armour's former job(s) include being a Director-Regents Board at University of Houston System Board of Regents, a Director at Mammoth Energy Partners LP, Vice President-Corporate Development at Basic Energy Services, Inc. from 2007 to 2008, President at Ambar Lone Star Fluid Services LLP from 1998 to 2001, President at PT Petroleum Partners LLC from 2013 to 2019, and Executive Vice President at Patterson-UTI Energy, Inc. from 2001 to 2005. Mr. Armour obtained his undergraduate degree from the University of Houston in 1977. |
| Alex V. Volkov |
Alex V. Volkov is an Independent Director at ProPetro Holding Corp. since 2024. He previously served as Vice President at Exxon Mobil Corp. starting in 1997. Prior to his current roles, he held positions as Director at ExxonMobil Gas Marketing Europe Ltd. from 2016 to 2019, and as Director at Mobil Trading & Supply Ltd. from 2018 to 2019. Mr. Volkov holds an MBA from The University of Alabama and an undergraduate degree from Nizhny Novgorod State University. |
| Mark Stephen Berg |
Mark Stephen Berg is currently the Vice Chairman at Permian Strategic Partnership, Inc., the Director, EVP-Corporate & Head-Operations at Pioneer Natural Resources USA, Inc., and the Director at Texas Oil & Gas Association. He is also an Independent Director at ProPetro Holding Corp., a Member of the State Bar of Texas, and a Trustee at the University of Texas Law School Foundation. Previously, he served as the Chairman at Dallas CASA, Inc., an Independent Director at HighPoint Resources Corp., the Secretary, EVP & General Counsel at American General Corp., the Secretary, Senior Vice President & General Counsel at Hanover Compressor Co., the Executive Vice President & General Counsel at Pioneer Southwest Energy Partners LP, a Partner at Vinson & Elkins LLP, and the Executive Vice President & General Counsel at Pioneer Natural Resources Gp LLC. He also held the position of Executive Vice President-Corporate Operations at Pioneer Natural Resources Co. Mr. Berg received his undergraduate degree from Tulane University (Louisiana) in 1980 and his graduate degree from The University of Texas School of Law in 1983. |
| Mary P. Ricciardello |
Mary P. Ricciardello currently works at Eagle Materials, Inc., as Independent Director from 2020, the University of St. Thomas (Texas), as Director, National Association of Corporate Directors (Houston), as Director from 2004, Archdiocese of Galveston-Houston, as Director, Victoria Express Pipeline LLC, as Director, and ProPetro Holding Corp., as Independent Director from 2023. Ms. Ricciardello also formerly worked at Devon Energy Corp., as Independent Director from 2011 to 2021, U.S. Concrete, Inc., as Director from 2003 to 2010, Noble Holding Corp. Plc, as Independent Non-Executive Director from 2003 to 2020, EnLink Midstream Partners LP, as Independent Director from 2014 to 2018, Midstates Petroleum Co., Inc., as Independent Director from 2012 to 2015, EnLink Midstream LLC, as Independent Director, Enlink Midstream Manager LLC, as Director from 2014 to 2018, EnLink Midstream GP LLC, as Director from 2014 to 2018, Reliant Energy, Inc., as Chief Accounting Officer & Senior Vice President from 2001 to 2002, and Statesman Resources Ltd., as Chief Accounting Officer & Senior Vice President from 2001 to 2002. Ms. Ricciardello received her Masters Business Admin degree from the University of Houston and undergraduate degree from the University of South Dakota. |
| G. Larry Lawrence |
G. Larry Lawrence is currently an Independent Director at Legacy Reserves GP LLC since 2006 and an Independent Director at ProPetro Holding Corp. since 2020. Previously, he served as an Independent Non-Executive Director at Legacy Reserves LP from 2006 to 2019, an Independent Director at Legacy Reserves, Inc. from 2006 to 2019, a Controller at Unocal Corp. from 2004 to 2006, a Controller at Pure Resources, Inc. from 2004 to 2006, the CFO, Secretary, Treasurer, CAO & Vice President at Natural Gas Services Group, Inc. from 2010 to 2019, the Secretary, Chief Financial & Accounting Officer at Natural Gas Services Group, Inc. in 2021, a Manager at Ineum Consulting LLC from 2000 to 2004, a Controller at ARCO Permian from 1993 to 2000, and the Chief Financial Officer at Lynx Operating Co. from 2006 to 2009. He obtained his undergraduate degree from Dillard University. |
| Jack B. Moore |
Jack B. Moore is currently the Independent Chairman at Occidental Petroleum Corp. He is also a Director at ProPetro Services, Inc., an Independent Director at KBR, Inc., a Director at the National Association of Manufacturers, a Director at CanCare, Inc., an Independent Director at ProPetro Holding Corp., a Director at Memorial Assistance Ministries, a Member of the American Heart Association, Inc., and a Member-Regents Board at the University of Houston System Board of Regents. In the past, Mr. Moore served as the Chairman of Cameron International Corp. from 2015 to 2016. He was also a Director at Maverick Tube Corp. in 2006. From 2016 to 2019, he was an Independent Director at Rowan Cos. Ltd. Additionally, he held positions as a Director at the American Petroleum Institute, Inc., the Petroleum Equipment Suppliers Association, the National Ocean Industries Association, and the Greater Houston Partnership Inc. He was also a Director at Spindletop Charities, Inc. Prior to that, Mr. Moore was the President & Chief Operating Officer at Baker Hughes Holdings LLC. He started his career at Baker Hughes in 1976 and held the position of VP-Eastern & Western Hemisphere Operations until 1999. Mr. Moore obtained his undergraduate degree from the University of Houston. |
| Michele Vion Choka |
Michele Vion Choka is currently an Independent Director at ProPetro Holding Corp. and a Member at NAPW, Inc. She previously held positions as an Independent Director at Boingo Wireless, Inc., Callidus Software, Inc., and HighPoint Resources Corp. She was also a Vice President of Human Resources at Sun Microsystems, Inc., Level 3 Parent LLC, Level 3 Communications LLC, and HighPoint Operating Corp. Additionally, she worked as a Regional Controller at Sony Corporation of America. Choka holds a Master's in Business Administration from Fairleigh Dickinson University and an undergraduate degree from Wesleyan University. |
