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Guy A. Thiessen

Wrongful death Attorney at Tulsa, OK

5.0   5 reviews
  • State Years
    Arkansas - AR 13 years
    Oklahoma - OK 34 years
  • Licensed for 13 years
    State AR
    Acquired 2010
    Active No misconduct found
  • Licensed for 34 years
    State OK
    Acquired 1989
    Authorized to Practice Law No misconduct found

We have not found any instances of professional misconduct for this lawyer.

About Guy

Learn Guy’s areas of practice.

Guy primarily handles wrongful death cases or injuries that are catestrophic. Many of his case arise from deaths caused by healthcare facility malpractice, such as nursing homes, hospitals, assisted living centers, and other healthcare facilities. He also handles cases of death and serious injury involving car accidents, drunk drivers, semi-trucks, motorcyles, bicycles, and many other types of accidents.  Guy has been representing injured clients and thier families for over 30 years. 

Photos and videos

Contact Guy

GT Law Firm
Bank of America Center, Suite 2800
15 West 6th Street
Tulsa, OK, 74119


5.0 / 5.0
  5 customer reviews
5 Star
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1 Star
Posted by Diane | May 1, 2021
This review is from a person who hired this attorney.
| Hired Attorney
Great success on Nursing home lawsuit
He was professional and personal from our first consultation until the case was settled. He made a difficult time less stressful. I would definitely recommend him to anyone needing legal services.
Posted by anonymous | April 1, 2015
Nursing home settlement
He negotiated a settlement with a nursing home regarding an accidental death of our family member. He kept us in the loop throughout the settlement and we were very pleased with his services..
Posted by Reba | March 25, 2015
nursing home case
Mr. Thiessen is a very knowledgeable Lawyer. He is working on a nursing home case for my family and I have a lot of faith in his services.
Posted by curtis | March 25, 2015
5 year battle with big insurance goes our way thanks to Guy and his knowledge/abilities of the law
I was rear ended in 2009 and had the privilege of having Guy help me with my case. It was a very complex case due to the fact that I was self employed and had no health coverage of my own. It took 5 long years , but was well worth the wait, I received complete medical coverage paid in full ( two surgeries -neck and elbow) total success on both and a very large 6 figure settlement due to his knowledge and ability to understand my case to the full value of my claims and how to work within the laws that are here to protect an everyday citizen/client like me. Thank you guy and I know who I'm going to call if the need ever arises again!!
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Posted by Matthew | March 25, 2015
Great lawyer to work with!
I had the pleasure of working with Guyon on a case we wish that never would happen but we ended up getting the right individual for the job. Guy was extremely professional and extremely educated over the facts and of the laws the case came out in our favor because of his understanding. Would definitely choose him again.


  • Contingency 20%-50%


AVVO RATING 10.0 (Superb)

Work Experience

  • Founder
  • GT Law Firm
  • 2015 - Present
  • Lead Litigator
  • Carr & Carr Attorneys
  • 1997 - 2015
  • Solo Practitioner
  • Guy A. Thiessen, PC
  • 1991 - 1997


  • Oklahoma City University School of Law
  • JD - Juris Doctor
  • 1989
  • Oklahoma State University
  • BS - Bachelor of Science
  • 1985


  • Oklahoma Association for Justice
  • Board of Directors
  • 2000 - Present
  • Oklahoma Association for Justice
  • President
  • 2007 - 2008

Languages Spoken

  • English

Honors and Awards

  • AV Rated
  • Martindale-Hubbell
  • 2015
  • AV Rated
  • Martindale-Hubbell
  • 2014
  • Super Lawyer
  • Super Lawyers Magazine
  • 2014
  • Super Lawyer
  • Super Lawyers Magazine
  • 2013
  • AV Rated
  • Martindale-Hubbell
  • 2013
  • Super Lawyer
  • Super Lawyers Magazine
  • 2012
  • AV Rated
  • Martindale-Hubbell
  • 2012
  • Super Lawyer
  • Super Lawyers Magazine
  • 2011
  • Super Lawyer
  • Super Lawyers Magazine
  • 2010
View all awards

Attorney endorsements

Received (4)
Given (3)
Endorse Guy
Nursing home abuse and neglect Attorney | Apr 15
Relationship: Fellow lawyer in community
"I endorse Guy. He is well versed in case strategy and best of all willing to share the benefit of his experience with his peers."
Wrongful death Attorney | Apr 02
Relationship: Fellow lawyer in community
"Guy is a great trial lawyer. He is also an awesome person. I have great respect for Guy's skills in and out of the courtroom. Anyone that hires Guy will be in good hands."
Car accident Attorney | Mar 26
Relationship: Worked together on matter
"I endorse this lawyer. Guy is an attorney with Integrity and talent. He has the ability to see the big picture and navigate a case to the best possible resolution for a client."
Personal injury Attorney | Mar 25
Relationship: Fellow lawyer in community
"I fully endorse Guy Thiessen. Guy is absolutely an outstanding attorney that is able to obtain remarkable results for his clients through innovative and analytical approaches. He has an unwavering commitment to his clients. No matter how difficult the case, Guy takes on the challenge and does the work necessary to find the best results for his clients."
Personal injury
Personal injury