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Collin J. Ketelsleger

Associate

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Energy and commercial litigation attorney Collin Ketelsleger helps oil-and-gas operators, producers, utility companies, and mineral owners resolve disputes over interest ownership, royalty calculation and payment, and well or lease valuation. He litigates title and royalty conflicts, non-participating royalty interest disputes, Oklahoma Corporation Commission proceedings, and breach-of-contract and damages claims across Oklahoma. A former petroleum engineer with an M.B.A. in energy, Collin brings an insider’s command of the technical and financial records that decide and influence these cases.

Collin works matters from the first filing through resolution. He has conducted witness depositions, argued various disputes before Oklahoma courts, and helped win the complete dismissal of an action on a dispositive motion. He manages written discovery, subpoena practice, and privilege review—including the expedited review of a large production after a substitution of counsel—and drafting dispositive and discovery briefing.

Collin’s engineering and business background provides extensive value to his clients. Collin analyzes production histories, decline-curve analyses, title records, and regulatory filings the way operators do, which lets him test an opponent’s damages model, value reserves and wells, and explain technical points in plain, understandable terms to a judge or jury. Drawing on years of evaluating reserve economics and asset valuations as a production engineer, he has also prepared and filed hundreds of applications and orders before the Oklahoma Corporation Commission on behalf of oil-and-gas operators.

Within the firm, Collin is a resource on legal research, motion drafting, and the responsible use of technology in litigation. He designs secure workflows that use artificial intelligence to improve efficiency while preserving attorney-client privilege, work-product protection, and client confidentiality.