About Mr. Mark R. Thiessen

Mark Thiessen was born and raised in Houston, Texas. Mr. Thiessen attended the Village School and St. Francis Episcopal Middle School before graduating from the Kinkaid School in 1996. While at the Kinkaid School, Mr. Thiessen won state in advanced acting and was captain of the tennis team. Mr. Thiessen then attended and graduated from Texas Christian University in 2000 with a Bachelor’s of Business Administration in Marketing. While at TCU, Mr. Thiessen was a member of Phi Delta Theta fraternity and on the dean’s list.

He then came back home to Houston and continued his education at South Texas College of Law (STCL) in Houston. While attending STCL, Mr. Thiessen was active in mock trial, various law societies and intramural football. He also studied International Criminal Law at the University of Malta during the Summer of 2001. Additionally, Mr. Thiessen studied abroad at the BPP Law School in London, England and at the University of Hawaii. Studying in these unique legal environments required Mr. Thiessen to adapt to various social, cultural, ethnic and economic groups, which is evident in his personality today.

After graduating from law school, Mr. Thiessen practiced civil law for three years in cases ranging from admiralty and maritime issues at Bell, Ryniker & Letourneau to toxic tort and personal injury claims at Brown Sims, P.C. He still maintains many close connections in the civil world. In January 2006, though, he followed his true calling to the criminal court room and became a skilled trial lawyer.

Trichter & Murphy, P.C., hired Mr. Thiessen as an associate in January 2006, where he worked for over five years. There, he studied under one of the foremost legal authorities in Texas.

Although his practice includes all areas of criminal defense, Mr. Thiessen maintains an emphasis on DWI and drugs or controlled substances. The trial of a DWI case dictates that on any given date, a trial lawyer must be not only well-versed in Rules of Evidence, case law pertaining to DWIs and constitutional law, but also numerous areas of science such as anatomy, physiology, toxicology, chemistry, computer science, biology and physics. A DWI case is the most difficult legal case to try because of the quality of adverse political sentiments against alleged drunk drivers such as Mothers Against Drunk Driving (MADD), much of the offense being videotaped and field sobriety tests that have become scientifically standardized. Also, many DWIs become more difficult when they are coupled with accidents that require accident reconstruction knowledge; injuries that occurred in accidents that require a working knowledge of anatomy, physiology and medicine; and chemical testing that requires breath, blood and urine. Clearly, for the skilled DWI trial lawyer, the defense of a citizen accused of DWI is intensely complex and requires a great deal of legal and scientific preparation. DWI defendants are unique in the criminal justice system and no greater opportunity exists for an innocent person to be convicted than with a DWI charge.

Mr. Thiessen prides himself in being an aggressive trial lawyer. If the district attorney will not bargain or justice will not be served by allowing the client to plead guilty, Mr. Thiessen will aggressively, passionately and professionally represent you in trial. He has a strong reputation as a trial lawyer and works hard to maintain that status. Mr. Thiessen is also the youngest criminal Super Lawyer in Texas for 2013.

Fearlessness in the courtroom is a byproduct of Mr. Thiessen’s normal routine. Outside the courtroom, he is an avid competitor in Brazilian jiu jitsu and muay thai. He is a member of BRAZIL-021 School of Jiu Jitsu and has won medals at the Atama Open, Abu Dabai Combat Club, Fight to Win, IBJJF Houston International Open and the Grappler’s Quest Tournament. He is also a member of Team Hoger Muay Thai and is a 2010 Warrior Dash finisher. Mr. Thiessen is also 2012 Color Run finisher and two time 2013 Tough Mudder finisher.

 

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Communication
4.2
Quality of Service
4.2
Responsiveness
4.2
Value for Money
4.2
DUI/DWI
Posted by anonymous
February 03, 2021
Hired Attorney

Mark Thiessen represented me in 2020 on my Felony case. I was highly recommended to him and he did not disappoint. Amongst the COVID pandemic, his office was quick to call me back and get me in a consultation the same week. I hired Mark Thiessen the same day. He got the job done, my case was dismissed!!! I would hire Mark Thiessen again in a heartbeat!!

 
DUI/DWI
Posted by anonymous
January 28, 2020
Hired Attorney

Simply put, Mark Thiessen is a criminal defense all-star. If he can’t get you a win, nobody can. I’ve worked with Mark on two very different cases, and both times I’ve been blown away by the level of honesty, strategy, and respect that Thiessen Law Firm brings to the table. You can feel the difference the second you step in the courtroom with Mark by your side. The time he has taken to build relationships and earn respect is clear. He knows how to push the envelope while still being respectful of the system when it matters. He won’t send you to trial when he knows it won’t work, and he won’t just roll over and charge you for the same lame deal everyone gets. Mark and his team carefully look at every angle and every opportunity to protect your freedom. I’ve seen other people go into the system for similar charges with cheaper defense and the difference is night and day. If you want to handle your case with as little impact on your life as possible, Mark Thiessen is the man to call.

 
Felonies
Posted by anonymous
August 21, 2018
Hired Attorney

Mark was an amazing attorney. He was very knowledgeable and answered every question I had. I recommend him to all my friends.

DUI/DWI
Posted by anonymous
August 21, 2018
Hired Attorney

Mr. Thiessen is by far the best in the business. I was nervous about the whole legal process after my second DWI arrest. He was able to ease my concerns and make me feel comfortable. He took my case to trial and won, not guilty! Meet with no one else, hire no one else!!

Personal Injury
Posted by B.
August 13, 2025
Hired Attorney

He held my case for a year and quit out of nowhere. I was under the impression that my case was solid because of the evidence and the hospital bill i gave him. No one communicated with me for almost 1 year now I'm back to square one. I will never use him again.

Services

Areas of Law

  • Criminal Law 4
    • DUI/DWI
    • Drug Crimes
    • Felonies
    • Misdemeanors
  • Family Law 3
    • Divorce
    • Child Custody
    • Premarital Agreements
  • Domestic Violence
  • Personal Injury 3
    • Automobile Accidents
    • Motorcycle Accidents
    • Wrongful Death
  • Other 2
    • Alimony
    • Truck Accidents

Practice Details

  • Languages
    Spanish
    English
  • Payment Information
    Payment & Cost Features
    Free initial consultation
    Fixed fees available
    Accepted Credit Cards
    American Express
    Discover
    MasterCard
    Other
    Visa
  • Firm Information
    Position
    Trial Attorney
    Firm Name
    Thiessen Law Firm
  • Additional Links

Experience

  • Bar Admission & Memberships
    Admissions
    2003, Texas
    2004, U.S. District Court, Southern District of Texas
    2016, Colorado
    Memberships
    Houston and American Bar Associations
    State Bar of Texas
    Lawyers Against Waste
    Houston Mariner's Club.
  • Education & Certifications
    Law School
    South Texas College of Law
    Class of 2003
    J.D.
    Other Education
    Texas Christian University
    Class of 2000
    B.B.A.
    Legal Certifications
    Board Certified in Criminal Law by Texas Board of Legal Specialization, Board Certified in DUI Law by DUI Defense Lawyers Association, Board Certified in DUI Defense by National College for DUI Defense

Contact Mr. Mark R. Thiessen

Trial Attorney at Thiessen Law Firm
5.0
249 reviews

733 E 12th 1/2 StreetHouston, TX 77008U.S.A.

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Attorneys FAQs

  • What year was this attorney first admitted to the bar?
    Mr. Mark R. Thiessen was admitted in 2003 to the State of Texas.
  • Is this attorney Martindale-Hubbell Client Review rated?
    Yes, Mr. Mark R. Thiessen has a 4.2 Client Rating from Martindale-Hubbell.
  • Does this attorney offer any legal services for a flat fee?
    Yes, Mr. Mark R. Thiessen offers fixed fees for certain legal services.
  • Does this attorney accept major credit cards?
    Yes, Mr. Mark R. Thiessen will accept American Express, MasterCard, Discover and Visa.
  • What law school did this attorney attend?
    Mr. Mark R. Thiessen attended South Texas College of Law.