Gregory L. Mahaffey

Bar Admission

Oklahoma, 1975

U.S. District Court Eastern District of Oklahoma, 1978

U.S. District Court Western District of Oklahoma, 1975

U.S. District Court Northern District of Oklahoma, 1975

U.S. Court of Appeals 10th Circuit, 1978

U.S. Supreme Court, 1985

Other Affiliations

Oklahoma County Bar Association (Member)

Oklahoma Bar Association (Member)

American Bar Association (Member)

Oklahoma City Mineral Lawyers Society (Member)

Oklahoma City Mineral Lawyers Society, 1990 - 1991 (President)

First Presbyterian Church of Norman (Trustee and Foundation Member)

Oklahoma City Association of Petroleum Landmen (Member)

Tulsa Association of Petroleum Landmen (Member)

Oklahoma Independent Petroleum Association (Member)

Litigation Counsel of America, Fellow in Trial Lawyer Honorary Society