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


Posted by: a DUI client about 4 years ago.

Having several friends who have had DWI's in the past, I had a few recommendations for lawyers to evaluate. After meeting with all of them I knew...

Gave me my life back

Posted by: smc about 4 years ago.

One never quite imagines getting pulled over after drinking and the consequences it brings until you're caught. And on top of that, one would never...
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Showing 2 of 46 peer endorsements

Christopher J Basner
Christopher Basner

Haddonfield, NJ

23 days ago

Relationship: Fellow lawyer in community

Attorney Mark Thiessen is the go to guy for DWI/DUI cases in Texas! Mark is a knowledgeable and aggressive lawyer. Some lawyers are aggressive,...
J L Carpenter
J Carpenter

Houston, TX

3 months 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: 04/27/2013
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

2010- present Board of Directors

Harris County Criminal 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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