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Mark Ryan Thiessen

Mark Ryan Thiessen

Over 100 Not Guilty Verdicts: Thiessen Law Firm
  • Criminal Law, DUI & DWI, Cannabis & Marijuana Law ...
  • Colorado, Texas
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Summary

Mark Thiessen is a criminal trial lawyer and the Chairman/CEO of the Thiessen Law Firm in Houston, Texas. Mark is Board Certified in Criminal Law by the Texas Board of Legal Specialization and Board Certified in DUI Law by the DUI Defense Lawyers Association. Mark earned the American Chemical Society-Chemistry and the Law (ACS-CHAL) Forensic Lawyer-Scientist designation, which is the highest form of scientific recognition available for lawyers. Mark is a frequent legal seminar lecturer, author of numerous published legal articles, and a faculty member for various organizations. Mark is the current DWI Committee co-chair and on the Board of Directors for Texas Criminal Defense Lawyers Association (TCDLA), on the Board of Directors for Harris County Criminal Lawyers Association (HCCLA) and a Charter Member and Director for DUI Defense Lawyers Association (DUIDLA). Mark is a 6 time Texas Super Lawyer and in the Top 100 Super Lawyers in Houston (2017 & 18). In 2019, Mark was the only criminal lawyer to be named to the Top 100 Super Lawyers in all of Texas. Mark has won DWI cases from total refusals up to quadruple intoxication manslaughter.

Mark’s reputation for fearlessness extends beyond his presence in the courtroom. In his free time, he competes as a Brown Belt in Brazilian jiu-jitsu, Muay Thai, and participates in competitions such as the Warrior Dash and Tough Mudder. He is also an avid snow skier, wake boarder and tennis player.

Education
South Texas College of Law
J.D. | Law
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University of Hawai'i at Manoa William S. Richardson School of Law
Environmental and Admiralty Law
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Texas Christian University
B.B.A. | Marketing
Activities: Phi Delta Theta
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Trinity University
Activities: Omega Phi and Tennis
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Professional Experience
Attorney/CEO
Thiessen Law Firm
- Current
Trial Attorney
Trichter and Murphy
-
Attorney
Brown Sims, P.C.
-
Attorney
Bell Ryniker Letourneau & Nork
-
Publications
Articles & Publications
Over 20 Published Works - See My Website, Please
2019’s Need-to-Know Changes to DWI Law
TCDLA Voice for the Defense
Speaking Engagements
Over 70 Speaking Engagements - International
Supreme Trial Tactics , DUIDLA Spring Seminar , Washington D.C.
Certifications
Board Certified in Criminal Defense
Texas Board of Legal Specialization
Board Certified in DUI Defense
DUI Defense Lawyers Association
Awards
Super Lawyer
Super Lawyers
Selected To Super Lawyers: 2013 - 2019
AV Preeminent
Martindale-Hubbel Lawyers Service
Peer Rated for Highest Level of Professional Excellence
Top 100 in Houston
Super Lawyers
Top 100 in Houston
Super Lawyers
Top 100 in Texas
Super Lawyers
Top 100 in Houston
Super Lawyers
Lawyer Scientist
ACS-CHAL
Rising Star
Super Lawyers
Selected To Rising Stars: 2010 - 2013
Professional Associations
DUIDLA
Vice President
- Current
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HCCLA
President Elect and Board of Directors
- Current
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TCDLA
DWI Co-Chair and Board of Directors
- Current
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NCDD
Member
- Current
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State Bar of Texas  # 24042025
Member
- Current
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Jurisdictions Admitted to Practice
Colorado
Colorado Supreme Court
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Texas
State Bar of Texas
ID Number: 24042025
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5th Circuit
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U.S. Supreme Court
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Fees
  • Free Consultation
Practice Areas
  • Criminal Law
  • DUI & DWI
  • Cannabis & Marijuana Law
  • Personal Injury
Languages
  • English: Spoken, Written
  • Spanish: Spoken, Written
Websites & Blogs
Website
Blog
Contact & Map
The Thiessen Law Firm
733 E 12th 1/2 St
Houston, TX 77008
Telephone: (713) 864-9000