Director Archives

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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…

Gary C. Clark

Gary Clark serves of counsel in the firm’s Tulsa office and a member of the Real Estate and Private Wealth & Closely-Held Business Practice Groups. His practice focuses on estate planning and trust and estate administration for both individuals and…

Glen D. Johnson, Jr.

Glen Johnson, Jr. is a director in the firm’s Oklahoma City office and a member of the Administrative & Regulatory Practice Group. As former chancellor of higher education, and as a former speaker of the Oklahoma House of Representatives, Glen’s…

Jon Cartledge

A director in the firm’s Tulsa office, Jon Cartledge is a member of the Appellate, Insurance, Litigation & Trial, and Product Liability Practice Groups. His practice focuses on legal research and brief writing as well as preparing oral arguments at…

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…

David L. Mossman

David Mossman has more than thirty years of experience practicing as an intellectual property attorney. As a member of the Intellectual Property Practice Group located in the firm’s Houston office, David assists clients in a broad range of patent transactional…

Gene L. Tyler

Gene Tyler is a director in the firm’s Houston office and a member of the Intellectual Property Practice Group. He has extensive experience representing clients in U.S. and international patent and trademark prosecution. Prior to practicing law, Gene spent 10…

Chandran D. Kumar

A director in the firm’s Houston office, Chandran Kumar is a member of the Intellectual Property Practice Group. For more than fifteen years, he has represented clients as a patent attorney primarily in patent preparation and prosecution, and routinely directs…

Nancy Allred Collins

Nancy Allred Collins is a director in the firm’s Dallas office. Her practice focuses on international, federal, state and local income taxation as well as gift and estate tax planning. As a member of the firm’s Taxation Practice Group, Nancy…