Mark D. Samson

Mark D. Samson is a senior attorney at Keller Rohrback P.L.C. in Phoenix, Arizona, with over 35 years of experience in tort law. A licensed veterinarian and accomplished trial lawyer, Mark brings a unique medical science background to his legal practice, allowing him to effectively litigate complex medical negligence, personal injury, and product liability cases.

Mr. Samson earned his J.D., summa cum laude, from Arizona State University College of Law in 1986 and is a member of the Order of the Coif. He also holds a B.S. in Bio-Agricultural Sciences from Arizona State University (summa cum laude, 1976), a D.V.M. from Washington State University College of Veterinary Medicine (summa cum laude, 1980), and an M.S. in Veterinary Anatomy from the same institution (1983).

Mr. Samson has achieved landmark results in personal injury and medical malpractice litigation, including one of Arizona’s largest verdicts in a transfusion-related AIDS case. He also led the successful Edwards verdict, a significant case in Arizona tort law. His scientific background gives him a distinct advantage in evaluating complex medical evidence and expert testimony, enhancing outcomes for plaintiffs.

Prior to co-founding Keller Rohrback’s Phoenix office in 2002, Mr. Samson was a member of the respected firm Dalton Gotto Samson & Kilgard, P.L.C., and earlier practiced at Meyer, Hendricks, Victor, Osborn & Maledon, where he became a member in 1992.

Mr. Samson has been recognized in Best Lawyers in America® for Medical Malpractice, Personal Injury, and Product Liability – Plaintiffs (2022–2025) and was selected to Super Lawyers Southwest from 2008 to 2021.

Mark D. Samson is admitted to practice in Arizona (1986) and Washington, D.C. (2008), and is an active member of the Arizona State Bar Association, Maricopa County Bar Association, Arizona Association for Justice (Sustaining Member), and the American Association for Justice. Through his rare blend of legal expertise and medical training, Mr. Samson offers unmatched advocacy for clients in complex injury and malpractice cases.

Law Office Affiliations

• Member, Keller Rohrback L.L.P.
• Member, Maricopa County Bar Association
• Member, Arizona State Bar Association
• Member, American Association for Justice
• Sustaining Member, Arizona Association for Justice

Licensed State

• Arizona
• Washington, D.C.

Education

• Arizona State University College of Law
  Juris Doctor (JD)
• Washington State University College of Veterinary Medicine
  MS in Veterinary Anatomy
• Washington State University College of Veterinary Medicine
  Doctor of Veterinary Medicine (DVM)
• Arizona State University
  BS in Bio-Ag Sciences with Summa Cum Laude

Awards & Badges