100 N. Broadway Ave., Suite 1700
Oklahoma City, OK 73102
Phone: 405-232-0621
Fax: 405-232-9659

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Ryan J. Duffy


Ryan joined Fellers Snider in 2018, bringing with him experience in areas of estate planning and administration, federal and state taxation, corporate organization, transactional law, oil and gas, energy, real estate, securities, non-profit organizations, commercial litigation and probate. His practice continues to focus on these same areas with a specific concentration on tax controversies and business development. Ryan has presented seminars for the Oklahoma Society of CPAs, the Oklahoma Tax Commission, Meritas Law Firms Worldwide, and the National Business Institution various topics including state and federal tax practice, business organization, estate planning, finance, succession planning, business valuations, and ethics. Ryan had his article entitled, ”Tax Considerations for Trusts and Estates”, published in the Oklahoma Bar Journal, Volume 92, No. 9, November 2021. He also had his article entitled, “Simple Estate Planning for your Client’s Children,” published in the Oklahoma Bar Journal, Volume 81, No. 27, October 9, 2010.

He has been admitted to practice in the Oklahoma Supreme Court and all Oklahoma District Courts, as well as the United States District Court for the Western District of Oklahoma and the United States Tax Court. He is a member of the Oklahoma Bar Association and the Oklahoma County Bar Association. He has served as chairman of the Oklahoma Bar Association Tax section and is also a member of the Estate Planning section. Mr. Duffy is an active member of the Executive Council for the Oklahoma Sports Hall of Fame, currently serving on its Board of Trustees, as well as its Honors Committee and Jim Thorpe Award Committee. Ryan has been named a Rising Star by Super Lawyers in the area of taxation.

Raised in Guymon, Oklahoma, Ryan graduated from Oklahoma State University with a Bachelor's Degree in Business Administration, with a major in Accounting. He received his Juris Doctorate degree in 2006 from the University Of Oklahoma College Of Law. While attending law school, Ryan received the Academic Achievement Award in Constitutional Law and served as Vice President of his class.

Ryan and his wife, Erin, enjoy spending their time with their two children. His family arrived in Oklahoma for the Land Run of 1889 and his family still proudly owns the original claim.


  • University of Oklahoma College of Law (J.D., 2006)
  • Oklahoma State University, bachelor’s degree in Business Administration with a major in Accounting (2003)

Bar Admissions

  • Oklahoma
  • Oklahoma Supreme Court
  • U.S. District Court for the Western District of Oklahoma
  • United States Tax Court

Professional Memberships

  • Oklahoma Bar Association
    • Tax and Estate Planning Section

Awards & Honors

  • Oklahoma Super Lawyers ® Rising Stars
  • The Best Lawyers in America (2021-2022)
    • Tax Law
    • Trust and Estates
  • Oklahoma Sports Hall of Fame Distinguished Service Award

Community Leadership & Activities

  • Executive Council for the Oklahoma Sports Hall of Fame
    • Board of Trustees
    • Honors Committee
    • Jim Thorpe Award Committee
  • Lawyers for Learning
  • Volunteer Coach at Edmond All-Sports Inc.