Member Directory

Glendell Nix

Maples, Nix & Diesselhorst
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Glendell Nix
Maples, Nix & Diesselhorst


Glendell D. Nix grew up in Broken Bow, Oklahoma. Glendell enjoyed rather unusual experiences and disciplines in his early years. Beginning at the age of 11 to 18 he was a self-taught juggler, unicyclist and tightrope walker, spending hours a day devoted to his passion. At the age of 12 he began performing his juggling, unicycle and tightrope walking act in front of small audiences as well as large audiences of thousands at events across Oklahoma. He enjoyed the challenge and discipline required. Even though Glendell had an interest in his unique discipline, he always maintained his love for academics and speech competition. While in high school he competed in speech competitions across the state, winning many awards in contemporary speaking, oration, prose and drama. In 1982, he graduated valedictorian of his high school class. His parents, a business owner/auto mechanic and stay-at-home mom, were his biggest supporters and taught hard work and discipline as the key to enjoying life and contributing to others' lives.


Glendell attended college at the University of Tulsa and Central State University (now University of Central Oklahoma). In May of 1986, Glendell graduated summa cum laude (With Highest Distinction) from Central State University with a Bachelor Business Administration degree with a major in Finance.

After graduating from college, Glendell attended the University of Oklahoma College of Law. During law school, he won Freshman Competition, an appellate practice competition, and was voted Top Speaker by the judges. Glendell was also the recipient of several academic awards for his scholarship while attending law school. Glendell was a member of the Oklahoma Law Review, a Note Editor for the Oklahoma Law Review and recipient of the Outstanding Note Editor award while a member of the Oklahoma Law Review. He was published in the Oklahoma Law Review. While attending law school Glendell was inducted as a member of the Order of the Coif (top 10%). In May of 1989, Glendell received his juris doctorate and graduated with Highest Honors (top 5%) from the University of Oklahoma College of Law.


After graduating from law school, Glendell began his career with the largest law firm in Oklahoma, Crowe & Dunlevy. While at Crowe & Dunlevy he practiced in the litigation section and represented large corporate defendants, including Conoco against one of the largest class actions in Oklahoma history. In 1991, he moved with his family to Broken Bow, Oklahoma and went into private practice with his brother, Terry Nix. For the next 4 years, Glendell represented individuals in personal injury cases, bankruptcy, medical malpractice, divorce and criminal cases, gaining a broad experience in many areas of law. While in Broken Bow, he was part of the court appointment system in criminal cases. At the age of 29, he was court appointed in a first-degree murder case that went to trial, making it the first trial by himself. The jury returned a verdict in his client's favor. That's when Glendell knew he wanted to be a trial lawyer. In 1994, Glendell returned to Oklahoma City to build his career as a trial lawyer and to represent individuals who have suffered injuries as a result of the wrongful conduct of others.

From 1994 to 2000, he practiced with the firm of Thomas, Gould & Nix. In 2000, he and Noble McIntyre teamed up to form Nix & McIntrye, LLP. In 2009, Glendell, along with Jacob Diesselhorst, started a new firm, Nix Law Group, concentrating on medical malpractice, catastrophic injuries and wrongful death. In 2015, Nix Law Group and Maples Law Firm merged to become Maples, Nix & Diesselhorst, where Glendell continues to be one of the top medical malpractice trial lawyers in Oklahoma continuing to represent individuals who have suffered catastrophic injuries and wrongful death. As a trial lawyer, Glendell has recovered over a hundred million dollars for his clients against some of the largest hospitals and corporations in Oklahoma and other states. In addition to medical malpractice cases, Glendell has represented clients against private prisons, product manufacturers, trucking companies, drug manufacturers and insurance corporations.


Glendell devotes almost 100% of his practice to individuals who have suffered catastrophic injuries and wrongful death. He has had the privilege of representing great people who happen to be the victims of catastrophic injuries or who have suffered the loss of a loved one because of the wrongful conduct of a corporation or individual. His greatest moments are seeing how his clients' courage to use the justice system and perseverance through the process has changed their lives and allowed them to get their lives back on track as best they can. He counts it a privilege as a trial lawyer to play a role in helping common, everyday people through our justice system.

Areas of Practice

Medical Malpractice
Wrongful Death
Personal Injury
Birth Injuries
Trucking Accidents
Brain and Spinal Cord Injuries
Serious Motor Vehicle Crashes
Serious Workplace Accidents
Products Liability
Nursing Home Neglect
Catastrophic Personal Injury Cases
Catastrophic Injuries

Litigation Percentage

100% of Practice Devoted to Litigation

Bar Admissions
Oklahoma, 1989
U.S. District Court Eastern District of Oklahoma
U.S. District Court Western District of Oklahoma
U.S. District Court Northern District of Oklahoma
U.S. Court of Appeals 10th Circuit


University of Oklahoma College of Law, Norman, Oklahoma
J.D. - 1989
Honors: With Highest Honors
Honors: Order of the Coif
University of Tulsa - 1983
Central State University
B.B.A. summa cum laude - 1986

Published Works

Jurisdiction: Missouri ex rel Wichita Falls General Hospital v. Adolf: Clarifying the Minimum Contacts Standard, 41 Oklahoma Law Review 565, 1988

Representative Cases

Andrew v. Depani-Sparkes, OK 42, 396 P.3d 210 (2017)
Maree v. Neawirth, OK 62, 374 P3d 750 (2016)
Monfore v. Phillips, 778 F.3d 849 (10th Cir.) (2015)
Chandler v. Valentine, OK 61, 330 P.2d 1209 (2014)
Rogers v. Mercy Health Center, Inc., OK CIV APP 69, 334 P.3d 426 (2014)
Liddington v. Burns, 916 F. Supp. 1127 (W.D. Okla.) (1995)
Jurisdiction: Missouri ex rel Wichita Falls General Hospital v. Adolf: Clarifying the Minimum Contacts Standard, 41 Oklahoma Law Review 565 (1988)


"Adhering to Procedural Guidelines in Filing the Suit and Conducting Discovery", National Business Institute, Oklahoma City, Oklahoma, 2007
"Identifying Hospital Corporate Liability and Institutional Negligence", National Business Institute, Oklahoma City, Oklahoma, 2007
"Ethics in Litigating Nursing Home Negligence Cases", Oklahoma Bar Association, Oklahoma City, Oklahoma, April 20, 2007

Honors and Awards

Order of the Coif, 1989
Member and Note Editor, Oklahoma Law Review, 1988 - 1989
Outstanding Note Editor, Oklahoma Law Review, 1989
Trial Lawyer of the Year (OAJ), 2017
Top 100 Trial Lawyers of America
Super Lawyers
Million Dollar Advocate Forum
Multi-Million Dollar Advocate Forum
Professional Associations and Memberships
Oklahoma Bar Association, Member
Oklahoma Association for Justice (OAJ), Member
American Association for Justice (AAJ), Member
AAJ Nursing Home Litigation Group, Member
AAJ Professional Liability Section, Member
Litigation Counsel of America, Fellow
American Association for Justice, Birth Injury Litigation Section

Past Employment Positions

Maples, Nix & Diesselhorst, 2015- Present
Nix Law Group, 2009 - 2015
Nix & McIntyre, 2000 - 2009
Thomas, Gould & Nix, 1994 - 2000
Nix & Nix, 1991 - 1994
Crowe and Dunlevy, 1989 - 1991

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