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With over 40 years’ experience in the oil & gas industry, Calvin has been involved in almost every aspect of the business including stimulation designs and implementation with Dowell (now Schlumberger) as a field engineer, ultimately leaving Dowell the area engineering manager for the western United States. Calvin has been involved in planning and drilling hundreds of horizontal wells in the United States, Canada, and Australia. Calvin has held executive positions at Martin Exploration, Hanover Compression, and Valerus Compression. Calvin has also been founder, cofounder or partner in Econoflow Inc, Vectra CBM, Calyx Energy I & II and currently in Calyx Energy III and Riverside Midstream LLC.
Steven C. Dixon has served as the CEO and Chairman of the Board of Directors of Tapstone Energy, LLC since December 2016. Mr. Dixon has more than 37 years of experience in the oil and natural gas industry. Prior to joining Tapstone, Mr. Dixon served in various roles for Chesapeake Energy Corporation, including acting CEO, Executive Vice President – Operations and Geosciences and COO, Executive Vice President – Operations and COO, Senior Vice President – Production and Vice President – Exploration. He holds a Bachelor of Science degree in Geology from the University of Kansas. He served as a member of the Board of Directors for Rice Energy Inc. and is a member of the Society of Petroleum Engineers, the American Association of Petroleum Geologists and the Advisory Board to the University of Kansas.
Nathaniel Harding has an extensive background in petroleum engineering, management and statistical modeling. He oversees engineering, operations, geo-science, financial analysis, planning, and partner relations. Nathaniel’s experience in unconventional drilling & completions led to his bringing horizontal development to Antioch’s predecessor, H&S, in 2010, drilling 20 wells in 3 years, and exiting for $120mm.
Nathaniel’s previous experience includes Encana, Occidental, Burlington Resources, and Marathon in unconventional plays of California, Colorado, West Texas and Wyoming in reservoir, drilling, completions and production engineering. Nathaniel developed a stochastic prospect analysis program and trained corporate A&D at EnCana. His experience includes field-level operations in multi-well pad drilling & completions, and developing drilling prognoses for wildcat fields. He has managed field asset teams with $10mm+ LOE budgets, and successfully designed and implemented cost & performance optimizing protocols. For his work in horizontal drilling & completions, and in statistical analysis, he has been published in SPE, Oil & Gas Monitor, and China Petroleum Exploration.
Nathaniel is a licensed Professional Engineer, and a University of Oklahoma cum laude graduate in mechanical engineering (BS) and Russian (BA), and an MBA from Oklahoma City University. He is a decorated Air Force captain, having served at NATO HQ in Afghanistan. In 2015 the Journal Record recognized Nathaniel as one of Oklahoma’s most admired CEOs. He is a board director for the OK Independent Petroleum Assoc, the Harold Hamm Diabetes Center, and Oklahoma Contemporary, among other business and community organizations.
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Raoul LeBlanc is a vice president on the IHS Markit financials team evaluating the dynamic North American onshore arena. A former partner at PFC Energy, LeBlanc has 20 years of experience in strategic and industry analysis. Familiar with a wide range of corporate and market issues, he has extensive experience on issues related to North American independents, upstream assets and natural gas markets. From 1997-2006, he worked at Anadarko Petroleum Corp. where he directed the strategic-planning effort, including strategy formulation, portfolio optimization, scenario planning and competitor analysis. He also worked on the company's M&A team, evaluating and modeling financial results, operational performance and E&P corporate valuation. Prior to Anadarko, LeBlanc was a senior oil analyst at Energy Security Analysis, a market analysis consulting company where he held responsibility for Asian markets and worldwide distillate fuels. He holds an undergraduate degree from Georgetown University and an M.A. in Energy and International Relations from the School of Advanced International Studies, The Johns Hopkins University.
Corey Walker is the president of operations for DCP Midstream, and oversees DCP’s North and Midcontinent business units, including Southern Hills and other related logistics, marketing, and commercial operations. Prior to DCP, Corey was Avantor’s Executive Vice President of the Americas, biomaterials and advanced technologies (NuSil) and electronic materials businesses. Previously, Corey served as Global Vice President of the Sperry Drilling Services and Multichem global business groups at Halliburton Energy Services and also led global strategy for the Completion and Production division. Corey has also held a variety of strategic and global business unit leadership roles at Dow Chemical and Dell Technology. Corey earned a bachelor’s in marketing and business management from Brigham Young University, as well as an MBA from Harvard Business School. Corey and his wife, Ashley, live in Denver with their four children.
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