The Expertise You Need to Get Justice

Representing the people in our community for over 30 years, GT Law Firm is the most experienced firm in Tulsa for medical liability cases. We know how to level the playing field and battle large organizations to get our clients justice.

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Don't take our word for it - here's what our clients are saying


I was glad I hired Guy Thiessen and GT Law Firm to deal with the insurance company for the person that hit my car and caused me injury. Guy forced them to take responsibility and we got my claim resolved quicker than I thought.

Tammy T.

GT law firm represented my family very well in our wrongful death case. Mr. Thiessen is very personable and extremely knowledgeable of the laws in Oklahoma. He was always available to answer our questions and kept us up to date on the progress of our case. I would highly recommend him to anyone that needed a great lawyer!

Tina W.

I am so glad we used Guy Thiessen as our lawyer. He is down to earth and approachable. He was always honest with us and we could communicate with him easily at all times. We never had any doubts about working with him. When I was searching for a lawyer, one of the things that impressed me most was that he called me personally and not one of his staff. I spoke with several law firms and just the fact that he made me feel like he cared meant the world.

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