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John Grinnan


John Grinnan's Headshot
John Grinnan's Headshot

John is a trial lawyer focused on one thing: getting the best results possible for clients. He accomplished this mission by aggressively and creatively representing plaintiffs against corporate giants across the United States. His practice is focused on catastrophic injury and death.

“At Arnold & Itkin, being a trial lawyer isn’t just a job—it’s our passion. We’re 100% committed to doing whatever it takes to get the best possible results for our clients. No matter what.



John grew up in Dallas and attended Jesuit College Preparatory School. He eventually moved to Austin, where he studied government at the University of Texas. After graduating from the University of Texas, John moved to Houston to attend law school at South Texas College of Law.

During law school, John became a varsity advocate for the law school’s nationally-ranked moot court program under the late Thomas Gerald Treece. John received two awards for his performance in the classroom, including one for obtaining the highest grade in the law school's Advanced Products Liability course. Additionally, John was listed on the Dean’s List for four consecutive semesters.

John graduated from law school cum laude in the top fifteen percent of his law school class. He received two graduating honors as he was admitted into the Order of Lytae and received an Academic Merit Scholarship.

John spent nearly a decade litigating product liability and mass tort cases prior to joining Arnold & Itkin. During this time, he took on some of the largest companies in the world and won time and again. John’s work in litigating the first three transvaginal mesh trials in Federal Court against Boston Scientific Corporation pressured the defendant into resolving thousands of individual cases around the United States. In the first two trials, juries returned verdicts against Boston Scientific for $26.7 million and $18.5 million. The day before closing arguments in the third trial, Boston Scientific agreed to settle the case.

John has a track record of obtaining seven-figure settlements in single-plaintiff personal injury litigation as well. One of his proudest victories was on behalf of a worker catastrophically injured while building a new pipeline. The defendants refused to take responsibility and used their extensive resources to defend the suit. John did not back down. He aggressively litigated the case and secured a multi-million dollar settlement for his client.

When John isn’t working, he is spending time with his wife Sarah and his daughter Clare. He enjoys golfing and rooting for his favorite football, basketball, and baseball teams.

Our Clients Are More Than Cases

Stories About the Lives That We've Helped

  • “I told him, “Kurt you’re my hero. You’re my knight in shining armor.” Because that’s how I feel toward him. He’s there to protect me, and I feel so safe. They are driven. They are aggressive. They will not quit for you. They will not give up for you. That’s what makes them special.”
    Mildred Solar Cortes El Faro Widow
    Play Video Mildred Solar Cortes
  • “They’re unstoppable! They definitely have the experience you need. They're fighting for these little people that can’t handle themselves when a giant comes. Almost like the David and Goliath. It’s an amazing thing to see.”
    Shawn Thomas Workplace Explosion Victim
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  • “I really feel like Arnold & Itkin brought justice to my family. Not only my family but many other families. It was just unreal how tirelessly they worked. Our trial lasted around 10 days. Every night, they were working ‘til way after midnight. There were a couple nights they never even slept. It was just amazing to me and my family.”
    Terry Yount Father of Risperdal Victim
    Play Video Terry Yount
  • “They told me they were pretty much going to handle everything, I wasn’t going to have to worry about anything—which they held up to that.”
    Tinisha Thomas El Faro Widow
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  • “Sometimes I would think about the level of stress that I had going through this whole thing, and I think about Arnold & Itkin taking on that stress for me. They picked it up and they ran with it. They have allowed me to close that chapter and feel good about it and move forward without looking back with regrets. I feel great.”
    Denver & Jodie Colter Gas Line Explosion Victims
    Play Video Denver & Jodie Colter
  • “Whatever I needed, they gave it to me, they made sure I had it. Just one call and they were there to do it.”
    Desmond Calloway Pipeline Fire Victim
    Play Video Desmond Calloway
  • “This firm has impacted every aspect of my life, past, present, future. They pulled off some miracles. They stood up for me when nobody else would.”
    Christopher Devall Workplace Explosion Victim
    Play Video Christopher Devall
  • “I felt like family because they were there to listen and hear—not just brush you off because 'you're just a client.' They let me know when I met them that everything was going to be all right.”
    Veronica Sowell Workplace Explosion Victim
    Play Video Veronica Sowell
  • “They were very helpful in me evolving through this tragedy, basically. The stress that I was under—they made me feel relaxed. I know that if I called them now and I needed something, they would help me get whatever I needed.”
    Donna Deason
    Play Video Donna Deason

Case Results

Check Out John's Victories

  • $14.5 Million Settlement Won for Seriously Injured Worker We secured a $14.5 million settlement for a worker who had to undergo treatment for his injuries.
  • $13.6 Million Serious Injury Case Settled for Injured Contract Worker Our firm settled a serious injury case for $13.6 million where a contract worker lost his leg in a dangerous conveyor that was improperly guarded and operated.
  • $9.8 Million Settlement Reached for Worker Who Lost His Leg Our firm settled a serious injury case for $9.82 million where an assembly line worker lost his leg in an improperly guarded dangerous auger.
  • $5.5 Million Verdict Won on Behalf of Commercial Truck Driver Our team secured a $5.5 million verdict on behalf of a truck driver injured in a truck-on-truck accident in rural Ohio—despite an offer of only $150,000 leading up to the trial.
  • $4.5 Million Settlement Reached for Injured Drilling Rig Contract Worker We secured a $4.5 million settlement for a contract worker injured in a drilling rig accident due to dangerous stairs and handrails.
  • $2.75 Million Settlement Recovered for Jack-Up Rig Assistant Supervisor Arnold & Itkin obtained a seven-figure settlement for a jack-up rig worker who was forced to use unsafe methods of equipment removal. After numerous depositions, we compelled the defendant to offer our client what he needed.
  • $2.3 Million Settlement Reached for Injured Warehouse Worker Our attorneys represented a worker struck by heavy furniture that fell off a forklift. In the end, we recovered $2.3 million on his behalf.

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