Atty. Guy Allen Thiessen

Atty. Guy Allen Thiessen

Guy Allen Thiessen is a lawyer practicing nursing home abuse and neglect, medical malpractice, wrongful death and 2 other areas of law. Guy received a B.S. degree from Oklahoma State University in 1985, and has been licensed for 37 years.

Tulsa Tulsa 37 yrs experience 37 year
Call (918) 731-2174 Book Appointment

Profile Summary

About Guy Allen Thiessen at a glance

Guy Allen Thiessen is a Member based in Tulsa, Oklahoma, practicing at GT Law Firm. They have 37+ years of legal experience, licensed to practice since 1989. Their practice focuses on medical malpractice, wrongful death, personal injury, and nursing home. Admitted to practice in Oklahoma U.S. District Court, Northern, Eastern and Western Districts of Oklahoma, U.S. Court of App (1989) and Arkansas (2010). Educated at Oklahoma City University (J.D., 1989) and Oklahoma State University (B.S. Business, 1985). Recognitions include AV Preeminent. Active member of Oklahoma Trial Lawyers Association (Member, Board of Directors, 1996—) The Association of Trial Lawyers of America. Serands clients in Tulsa, OK and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Guy Allen Thiessen is a lawyer practicing nursing home abuse and neglect, medical malpractice, wrongful death and 2 other areas of law
  • Guy received a B.S. degree from Oklahoma State University in 1985, and has been licensed for 37 years
  • Guy practices at GT Law Firm in Tulsa, OK

Practice Areas Explained

Guy Allen Thiessen's Areas of Practice

Each practice area below reflects the types of cases Guy Allen Thiessen handles, with a brief overview of what that area of law covers.

Medical Malpractice

Medical malpractice lawyers represent patients harmed by negligent doctors, hospitals, and other providers. Free case review, no fee unless you win.

Guy Allen Thiessen is one of 49,086 medical malpractice attorneys indexed nationally. Browse medical malpractice attorneys in Oklahoma →

Wrongful Death

Guy Allen Thiessen is one of 31,253 wrongful death attorneys indexed nationally. Browse wrongful death attorneys in Oklahoma →

Personal Injury

Personal injury attorneys help accident victims recover compensation for medical bills, lost wages, and pain & suffering. Most work on contingency — no fee unless you win.

Guy Allen Thiessen is one of 264,852 personal injury attorneys indexed nationally. Browse personal injury attorneys in Oklahoma →

Nursing Home Abuse & Neglect

Guy Allen Thiessen is one of 6,002 nursing home attorneys indexed nationally. Browse nursing home attorneys in Oklahoma →

Jurisdictional Context

Why local counsel matters in Oklahoma

Practicing law in Oklahoma. Legal matters in Oklahoma are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Tulsa are typically filed in the local municipal court or the appropriate Oklahoma state district court, depending on subject matter and amount in controversy. An attorney licensed in Oklahoma brings working knowledge of local procedural deadlines, judicial practices in this andnue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in Oklahoma courts without local counsel or pro hac vice admission.

Looking for additional Oklahoma attorneys? Browse all attorneys in Tulsa or all attorneys in Oklahoma.

Frequently Asked

Common questions about Guy Allen Thiessen

Where is Guy Allen Thiessen's law office located?
Guy Allen Thiessen's law practice is located in Tulsa, Oklahoma. The firm is GT Law Firm. You can contact the office directly through this profile page.
What practice areas does Guy Allen Thiessen handle?
Guy Allen Thiessen focuses on medical malpractice, wrongful death, personal injury, nursing home. Each practice area listed reflects experience handling cases of that type in Oklahoma.
How long has Guy Allen Thiessen practiced law?
Guy Allen Thiessen has 37+ years of legal experience and has been licensed since 1989.
Where did Guy Allen Thiessen go to law school?
Guy Allen Thiessen earned their education at (J.D., 1989); (B.S. Business, 1985).
How can I contact Guy Allen Thiessen for a consultation?
You can contact Guy Allen Thiessen directly through this profile page. Click "Ask the Attorney" to submit a question, or "Schedule a Consultation" to book a meeting. Most claimed-profile attorneys respond within one business day.
What awards or recognition has Guy Allen Thiessen received?
Guy Allen Thiessen's notable recognition includes: AV Preeminent.

Education

J.D.
Oklahoma City University
- 1989
B.S. Business
Oklahoma State University
- 1985

Awards

AV Preeminent

Bar Admissions

Oklahoma U.S. District Court, Northern, Eastern and Western Districts of Oklahoma, U.S. Court of App
Admitted: 1989
Arkansas
Admitted: 2010

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