Personal Injury Lawyers Serving Oklahoma
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Jacob D. Diesselhorst

Founding Attorney

Edmond accident attorney Jacob D. Diesselhorst is an experienced and respected trial lawyer at Maples, Nix & Diesselhorst. He has been practicing law since 2002, and now focuses on a wide range of personal injury matters, including truck accidents, motor vehicle accidents, catastrophic injury, and wrongful death. Throughout his extensive legal career, Jacob has earned a name for himself as a formidable opponent in the courtroom, providing aggressive representation that his clients can rely on. He works hard to gain the trust and respect of his clients, offering a compassionate, personalized approach as he works to understand your unique situation.

Born in Peoria, Illinois, Jacob attended Fairview High School in the rural northwestern region of Oklahoma. Alongside his twin and two other brothers, Jacob was an All-State Basketball player during his time in high school, following in the footsteps of his father who played college basketball for the Bradley Braves during the Missouri Valley Conference in the 1970s. In 1994, Jacob graduated high school in the top 5% of his class before going on to attend Oklahoma State University. There, he obtained his bachelor’s degree in political science with a minor in business, graduating in 1999 with honors. After finishing his undergraduate studies, Jacob was accepted to the University of Oklahoma College of Law. During his time in law school, he was known for being a likeable, outspoken student and was regularly on the Dean’s Honor Roll list. He graduated with his J.D. in 2002 and passed the Oklahoma Bar Exam two months later.

Jacob began his legal career working for an insurance defense firm in Oklahoma City. He worked at the firm for two years before deciding to “switch sides” and instead defend the rights of injured victims and their families. He joined Glendell, Nix & Noble McIntyre of Nix & McIntyre, LLP. There, he began his personal injury practice before ultimately joining Maples, Nix & Diesselhorst in 2015.

Though he is one of the relatively younger attorneys in his field, Jacob has quickly earned a name for himself as a skilled and aggressive attorney, especially when it comes to medical malpractice law. He takes great pride in his ability to help victims and their loved ones throughout the state of Oklahoma, offering exceptional legal services and highly-focused representation. When not in the courtroom, Jacob is a member and actively involved with numerous organizations, including the Oklahoma Association for Justice, where he is a member of the Advisory Board, Executive Board, and Legislative Committee.

Jacob is married to his college sweetheart, Tressa Diesselhorst. Together, they have three children who are Jacob’s most proud achievements. A massive sports fan, Jacob regularly attends numerous professional and college football and basketball games and also enjoys watching his children play basketball and soccer, and playing golf.


  • University of Oklahoma College of Law: J.D.; 2002
  • Oklahoma State University: B.A.; 1999
  • Fairview High School; 1994

Professional Memberships

  • Oklahoma Bar Association
  • American Bar Association
  • Oklahoma County Bar Association, Young Lawyers' Division
  • American Bar Association, Young Lawyers' Division
  • American Bar Association, Health Law Section
  • American Association for Justice
  • Oklahoma Association of Justice

Multi-Million Dollar Injury Advocates

Past Case Wins & Victories
  • $4 Million Trucking Accident
  • $2 Million Trucking Accident
  • $2 Million Trucking Accident
  • $1 Million Trucking Accident
  • $850 Thousand Trucking Accident
  • $750 Thousand Trucking Accident
  • $630 Thousand Automobile Accident
  • $600 Thousand Trucking Accident
  • $600 Thousand Trucking Accident
  • $500 Thousand Automobile Accident
  • $500 Thousand Automobile Accident
  • $450 Thousand Automobile Accident

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