Jonna Vanderslice

Jesse Chapel is a lawyer recognized by Best Lawyers in the practice area of Litigation and Controversy - Tax. Jesse practices law in Oklahoma City, Oklahoma Best Lawyers has recognized Jesse Chapel since 2027. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Jesse Chapel is held by other lawyers.

EXPERIENCE Successfully tried numerous lawsuits through jury trial and bench trial, as well as appeal, in both state and federal courts Significant experience in complex commercial arbitration matters filed under the American Arbitration Association Experience in litigation and arbitration matters filed in Oklahoma, Texas, Kansas, Arkansas, Georgia, Colorado, Wyoming and California Testified as an expert witness on matters related to the recovery of attorney fees in complex trust litigation S...

Melissa began her legal career in-house with a Fortune 500 oil and gas company. Since that time, her practice has focused on oil, gas, and energy law , including the preparation of drilling and division order title opinions across Oklahoma, Texas, and North Dakota. Her work frequently involves the preparation of curative documents, probate-related matters, and support in litigation for oil, gas, and renewable energy clients. In addition to her energy law practice, Melissa represents clients i...

Amy brings more than 25 years of experience in trial and appellate practice, with a career shaped by leadership roles and in-depth involvement in Family Law matters. Her background includes serving with Oklahoma Child Support Services, where she helped lead the state’s implementation of the Uniform Parentage Act, as well as her service as a District Judge for the Cherokee Nation. This range of experience provides her with a well-rounded understanding of family law issues affecting indiv...

R. Ryan Deligans began practicing law in 2003 and received his Juris Doctorate from the University of Oklahoma College of Law where he was honored as the Outstanding Graduate in the area of Trial Practice and Procedure. His practice has been focused on complex litigation involving Insurance Law, Manufacturer’s Product Liability, and cases involving catastrophic injury or death. Ryan is annually selected by his peers for inclusion in Super Lawyers Magazine. He has been selected as a Top ...

Erin Oakley is a lawyer recognized by Best Lawyers in the practice area of Commercial Litigation. Erin practices law in Oklahoma City, Oklahoma Best Lawyers has recognized Erin Oakley since 2026. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Erin Oakley is held by other lawyers.

Born Ponca City, Oklahoma, July 5, 1941; admitted to bar, 1966, Oklahoma. Preparatory education, Oklahoma State University (B.S., 1963); legal education, University of Oklahoma (J.D., 1966). Fraternity, Phi Alpha Delta. Assistant Attorney General, State of Oklahoma, 1968. (J.A.G.C., U.S. Army, 1966-68).

Kurt Rupert is a lawyer recognized by Best Lawyers in the practice areas of Antitrust Law and Commercial Litigation. Kurt practices law in Oklahoma City, Oklahoma Best Lawyers has recognized Kurt Rupert since 2016. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Kurt Rupert is held by other lawyers.

Ashley Powell is a lawyer recognized by Best Lawyers in the practice areas of Commercial Litigation and Family Law. Ashley practices law in Oklahoma City, Oklahoma Best Lawyers has recognized Ashley Powell since 2021. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Ashley Powell is held by other lawyers.

Amy J. Sine is a lawyer recognized by Best Lawyers in the practice areas of Litigation - Trusts and Estates, Nonprofit / Charities Law and Trusts and Estates. Amy J. practices law in Oklahoma City, Oklahoma Best Lawyers has recognized Amy J. Sine since 2003. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Amy J. Sine is held by other lawyers.