About Devon Antonia
Devon Antonia Cantrell studied political science and history at the University of California, Davis, where she earned her B.A. in 2006. She went on to law school at the University of Tulsa College of Law, completing her J.D. in 2011 and taking courses in oil and gas and energy law while there.
She is admitted to practice in Oklahoma, Colorado and Wyoming. Cantrell joined bar sections that align with the work she does: she has been a member of the Family Law Section and the Estate Planning, Probate and Trust Section of the Oklahoma Bar Association since 2015. She also holds membership in WealthCounsel, a national collaborative for estate planning professionals.
Cantrell moved into firm leadership in 2018 when she became a managing partner at Fleischer, Fleischer, Painter & Cantrell, PLLC. In that role she oversees firm operations and participates in client matters, balancing administrative responsibilities with courtroom and transactional work. She also maintains an office under the name Cantrell Law Office, PLLC.
Her legal background includes training in energy and oil and gas law from law school, but her professional memberships reflect a steady involvement in family law and estate planning. Over the years she has handled matters that touch on divorce, custody and support, as well as drafting wills, trusts and estate administration. The mix of litigation and planning work means she moves between negotiation, court proceedings and document drafting in a typical week.
Colleagues describe Cantrell as steady in the courtroom and methodical in bringing cases to resolution. She participates in continuing legal education and the bar sections that track changes in family law and probate practice. That keeps her current on legislative and procedural shifts that affect clients in Oklahoma and neighboring states.
Outside firm management and client work, Cantrell engages with professional groups that specialize in estate planning. Her involvement in those networks provides access to model documents and peer review that inform her drafting and administration work.
As of 2026 she divides her time between firm leadership and client representation, handling family law, estate planning, probate and trust matters in Oklahoma and the surrounding region.
