Mithun Mansinghani

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...

Courtney K. Warmington is an advisory director in Crowe & Dunlevy’s Labor and Employment Section. Since joining the group in 1999, Ms. Warmington has successfully represented management in cases brought by employees under Title VII of the Civil Rights Act, the Americans With Disabilities Act, the Age Discrimination in Employment Act, the Family and Medical Leave Act, Oklahoma’s Workers’ Compensation laws, and the Fair Labor Standards Act. In addition to her litigation pr...

Stacey D. Spivey's practice focuses on estate planning and trust and estate administration and litigation. Ms. Spivey works with individuals to prepare and implement their estate plans to meet family, tax and other goals, including business succession planning. She also works with individuals and fiduciaries on the management and settlement of trusts and estates, including probate administration, preparation of federal estate and gift tax returns, and estate and trust litigation matters. Ms. ...

John D. Robertson is a lawyer recognized by Best Lawyers in the practice areas of Corporate Law, Mergers and Acquisitions Law and Securities / Capital Markets Law. John D. practices law in Oklahoma City, Oklahoma Best Lawyers has recognized John D. Robertson since 2007. 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 John D. Robertson is held by other lawyers.

Amy Sherry Fischer is a lawyer recognized by Best Lawyers in the practice areas of Commercial Litigation and Product Liability Litigation - Defendants. Amy Sherry practices law in Oklahoma City, Oklahoma Best Lawyers has recognized Amy Sherry Fischer since 2020. 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 Sherry Fischer is held by other lawyers.

David B. Donchin’s practice includes Insurance Law, Complex Litigation, Personal Injury Law, Products Liability, Employment Law, Environmental Law, and Medical Malpractice. In addition to his legal practice, David has served as an Adjunct Professor for Trial Practice at the University of Oklahoma College of Law and as a member of the faculty of the Southern Region of the National Institute of Trial Advocacy. David served as the Managing Director of Durbin Larimore Bialick from 2014 to 2...

John H. Edwards is a lawyer recognized by Best Lawyers in the practice areas of Banking and Finance Law, Business Organizations (including LLCs and Partnerships), Commercial Finance Law, Corporate Law and Energy Law. John H. practices law in Oklahoma City, Oklahoma Best Lawyers has recognized John H. Edwards since 2023. 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 regar...

Over 30 years representing defendants in business and complex litigation, including commercial and employment disputes, securities, class action and antitrust cases. Has lectured in the areas of trial practice, civil procedure, and insurance law. Former President of the Oklahoma County Bar Association, 2007-08.

Lori F. Winland is a lawyer recognized by Best Lawyers in the practice areas of Employment Law - Management, Labor Law - Management and Litigation - Labor and Employment. Lori F. practices law in Oklahoma City, Oklahoma Best Lawyers has recognized Lori F. Winland 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 Lori F. Winland is held by other la...

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.