Mark D. Spencer


Prior to his retirement in 2024, Mark Spencer’s litigation practice involved the representation of clients in class action lawsuits, employee benefits litigation, insurance litigation, healthcare litigation, employment litigation, and appellate litigation in state and federal courts nationwide, with a heavy emphasis on class action and ERISA litigation. Throughout his extensive career, he handled more than 300 federal court cases and in excess of 60 federal appeals, successfully represented clients before the U.S. Supreme Court and various federal and state appellate courts, and served as an expert witness in major litigation.

Mark’s achievements earned him inclusion in The Best Lawyers in America (commercial litigation; employee benefits/ERISA law; ERISA litigation; insurance law) and Oklahoma Super Lawyers. He was selected by Best Lawyers as the “Oklahoma City Employee Benefits (ERISA) Lawyer of the Year” for 2015 and “Oklahoma City ERISA Litigation Lawyer of the Year” for 2016, honors only given to a single lawyer in each legal specialty in each community.

Upon graduating from The John Marshall Law School and before entering private practice, Mark served as a law clerk for the Honorable William J. Holloway, Jr., Chief Judge of the U.S. Court of Appeals for the Tenth Circuit.

  • J.D., with distinction, The John Marshall Law School, 1987
    • Moot Court Executive Board; William Starr Insurance Law National Moot Court Competition, Hartford, CT (Third Place); Illinois State Bar Association Moot Court Competition, Springfield, IL (Second Place)
  • B.A., Tulane University, 1981