Shareholder/Director Archives

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Roger Butler

A shareholder in the firm’s Tulsa office, Roger Butler has more than 35 years of experience assisting clients in need of insurance representation. His practice is concentrated in the area of bad faith and extra-contractual liability cases arising from both…

Bradley W. Welsh

Brad Welsh is a shareholder in the firm’s Tulsa office and a member of the Energy, Environment & Natural Resources, Litigation & Trial, and Administrative & Regulatory Practice Groups. With more than 20 years of energy law experience, Brad primarily…

Craig M. Regens

Craig Regens is a shareholder in the firm’s Oklahoma City office. He concentrates his practice in the areas of bankruptcy, restructuring, and creditors’ rights, energy and environmental litigation, oil and gas transactions, and commercial litigation. Craig frequently represents oil and…

Dale Cottingham

Dale Cottingham is a shareholder in the firm’s Oklahoma City office with more than 40 years of experience practicing in the areas energy and environmental law. He has extensive experience representing clients across a broad spectrum of oil and gas…

Lewis LeNaire

Lewis LeNaire is a shareholder in the firm’s Oklahoma City office. As a member of the Energy, Environment & Natural Resources Practice Group, Lewis represents energy industry clients in complex business litigation in state and federal courts. His comprehensive energy…

Deric McClellan

Deric McClellan is a shareholder in the firm’s Tulsa office. Deric’s practice includes representation of individuals and businesses in a wide range of commercial disputes in federal, state, tribal, and bankruptcy court. His primary focus is complex business disputes and…

J. Christopher Davis

Chris Davis is a shareholder and director in the firm’s Tulsa office. He represents clients as a member of the firm’s Alternative Dispute Resolution, Insurance, Intellectual Property, Litigation & Trial, and Product Liability Practice Groups. With more than 27 years…

Madalene A.B. Witterholt

With more than 35 years of experience, Madalene Witterholt assists clients in the full spectrum of employment law issues. Starting with employee hiring and I-9 compliance, employer policy development and day-to-day advice she provides employee training as well as the…

L. Mark Walker

L. Mark Walker, a director in Crowe & Dunlevy’s Oklahoma City office, focuses his practice in the areas of energy, natural resources and environmental law. His practice includes litigation in both federal and state courts, as well as practicing before…

Evan G.E. Vincent

Evan Vincent specializes in the litigation process. He knows how to use the procedures and rules that govern civil lawsuits to his clients’ advantage, and he has the skills and experience to take a case to trial in front of…