Mark Ryan Thiessen

Mark Ryan Thiessen

DUI / DWI Attorney

Houston, TX





No Misconduct


Spanish , English

Answers and Advice

14 questions answered.

About Me

Born and raised in Houston, Texas. Went off to college at TCU and came back home for law school. I know Houston. I am raising my family in Houston. I love Houston. It's my job to protect the citizens of Houston. My favorite part of this job is going to trial. And, it's that love of trial that gets great results before a trial is necessary. Too often the State will try and force you intoa...

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Practice Areas

Payments & Fees

Payment Types

Cash, Check, Credit Card


Fixed (Always), Free Consultation (60 minutes)

Client Reviews

Showing 2 of 110 client reviews

Aggressive lawyer at Houstons best firm

Posted by: Jason over 4 years ago.

I did my homework prior to interviewing/hiring lawyers and mark is well known as a dwi specialist who is great in court. I did not want anotet...

Deserves your complete trust

Posted by: Michael over 4 years ago.

I had an excellent experience with Mark Thiessen. I went to his office after recieving a DWI and was in a meeting with him within five minutes of...
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Showing 2 of 50 peer endorsements

Glen W. Neeley
Glen Neeley

Ogden, UT

4 days ago

Relationship: Fellow lawyer in community

I met this talented lawyer about two years ago at advanced training for DUI lawyers regarding blood testing and GCMS. This attorney knows his stuff,...
Craig Alan Greening
Craig Greening

Bryan, TX

10 days ago

Relationship: Fellow lawyer in community

I endorse this lawyer.
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2003 License Status: Eligible To Practice In Texas for the state of Texas.
Last updated by Avvo: 06/14/2014
We have not found any instances of professional misconduct for this lawyer.

Work Experience

Showing 1 of 2 job entries
2011 – present

The Thiessen Law Firm


Showing 1 of 4 degrees

2003 JD - Juris Doctor in Law

South Texas College Of Law


Showing 1 of 6 awards

2013 Texas Super Lawyer

Thomson Reuters


Showing 1 of 9 association entries

2007- present Member

Texas Criminal Defense Lawyers Association

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Showing 2 of 6 publications

2012 Falesly Elevated Ethanol Results Using Hospital Enzymatic Assay Blood Testing

HCCLA Defender Magazine

2012 Falsely Elevated Ethanol Results Using Hospital Enzymatic Assay Hospital Blood Testing

The Voice (TCDLA))

Speaking Engagements

Showing 2 of 12 occasions

2012 Trial Tactics From The Trenches


2011 DWI Voir Dire - Accident and Blood Testing

at Voir Dire Seminar

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