John Hallman

John A. Hallman is an associate attorney with Simon Greenstone Panatier, PC. His practice concentrates on catastrophic personal injury and wrongful death cases arising out of commercial truck wrecks, workplace injuries and all injuries caused by the negligence of others.

John won his first civil jury trial in 2015, and has continued to litigate cases since that time.  John is a third-generation attorney who has dedicated his career to personally serving plaintiffs in civil litigation and all aspects of trial work.

A Dallas native, John attended the Neeley School of Business at Texas Christian University, where he received a degree in Accounting and Finance. He then studied law at Indiana University, where he was an E.W. Kintner Merit Scholar, drummer in the law school band, and a semi-finalist in the Maurer School of Law Trial Competition.

Mr. Hallman has litigated a wide range of cases including commercial trucking and bus wrecks, oil and gas field injuries, non-subscriber workplace injuries, wrongful death claims, product liability claims, premises liability claims, and general litigation.

Practice Areas

  • Catastrophic Injury
  • Traumatic Brain Injury
  • Commercial Trucking Wrecks
  • Aviation Disasters
  • Bus Wrecks
  • Non-Subscriber Workplace Injury
  • Oil and Gas Field Injury


  • Indiana University Maurer School of Law, Bloomington, Indiana, 2014, J.D.
  • Texas Christian University, Fort Worth, Texas, 2009, B.B.A., Major: Accounting and Finance

Court Admissions

  • State Bar of Texas (2014)
  • State Bar of New Mexico (2015)
  • United States District Court, Northern District of Texas (2015)

Honors and Awards

  • Eagle Scout

Professional Memberships

  • Dallas Trial Lawyers Association, Member (2014 – Present)
  • Texas Trial Lawyers Association, Member (2014 – Present)
  • New Mexico Trial Lawyers Association, Member (2015 – Present)
  • American Association for Justice, Member (2014 – Present)
  • Dallas Bar Association, Member (2014 – Present)

Published Works

  • “Truck Wreck Investigation 101,” State Bar of Texas Advanced Personal Injury Law Course, Ron C. McCallum and John Hallman, Summer 2016

Board Positions

  • Board of Directors, Dallas Trial Lawyers Association
  • Advocates Board of Directors, Texas Trial Lawyers Association
As a lawyer, and as a private citizen, you see a lot of injustice. You see a lot of people who should have been held responsible and are not, and people who were punished wrongfully and not vindicated. I chose this job because, on a daily basis, I get to work with individuals and families who have suffered great losses in their fight against the corporations and insurance companies who have harmed them. Perhaps more importantly, these corporations and insurance companies steadfastly refuse to take responsibility for their actions, and in many situations, they continue to endanger the public. As your attorney, we are truly in this together, and I look forward to providing aggressive representation, all the way through trial, while keeping you personally informed about the process at every step of the way.