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.
Jeff Sieler is a managing director in the global energy group of Citigroup Investment Bank. Sieler joined Citi as its A&D team's founding member and moved to the investment-banking team to increase technical emphasis across the broader coverage of Citi energy investment-banking. Prior to joining Citi, Sieler was the leader of Marathon Oil Corp.'s reservoir-performance team and champion of its Eagle Ford integrated project team. His 28 years with Shell Oil Co. culminated at the vice president level as manager of the subsurface and well technologies team and as a member of the major's research and development council. Sieler received his M.S. in Petroleum Engineering from Tulane University and B.S. in Chemical Engineering from the University of North Dakota.