Mark Ryan Thiessen

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Over 100 Not Guilty Verdicts: Thiessen Law Firm

Experience: 20 years

Criminal Law, DUI & DWI, Cannabis & Marijuana Law and Personal Injury

Colorado, Texas, 5th Circuit and U.S. Supreme Court

Black Belt, Top 100 in Texas and 9 others

Free consultation have

Awards 11

Experience 20y

Videos 5

Online & Web 9

Biography Submit listing

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.

Jurisdictions Admitted to Practice

Colorado

Colorado Supreme Court
Since 2016

Texas

State Bar of Texas
ID Number: 24042025
Since 2003

5th Circuit

Since 2010

U.S. Supreme Court

Since 2010

Professional Experience

2011 - Current

Thiessen Law Firm

Attorney/CEO

2006 - 2011

Trichter and Murphy

Trial Attorney

2004 - 2006

Brown Sims, P.C.

Attorney

2003 - 2004

Bell Ryniker Letourneau & Nork

Attorney

Education

2003

South Texas College of Law

J.D. | Law

2002

University of Hawai'i at Manoa William S. Richardson School of Law

Environmental and Admiralty Law

2000

Texas Christian University

B.B.A. | Marketing

Activities: Phi Delta Theta

1998

Trinity University

Activities: Omega Phi and Tennis

Awards

year - Mark Ryan Thiessen

Black Belt

IBJJF

year - Mark Ryan Thiessen

Top 100 in Texas

Super Lawyers

Top 100 in Houston

Super Lawyers

year - Mark Ryan Thiessen

Super Lawyer

Super Lawyers

AV Preeminent

Martindale-Hubbel Lawyers Service

Top 100 in Houston

Super Lawyers

year - Mark Ryan Thiessen

Top 100 in Houston

Super Lawyers

year - Mark Ryan Thiessen

Top 100 in Texas

Super Lawyers

Top 100 in Houston

Super Lawyers

year - Mark Ryan Thiessen

Lawyer Scientist

ACS-CHAL

year - Mark Ryan Thiessen

Rising Star

Super Lawyers

Contacts

The Thiessen Law Firm 733 E 12th 1/2 St Houston TX 77008 Telephone: (713) 864-9000

Videos

Mark Thiessen - Intoxication Manslaughter Lawyer in Houston

“You don’t have to be a bad person to get a DWI. Anybody can get a DWI. You don’t have to have any intent.”

Board Certified Criminal Lawyer and Super Lawyer Mark Thiessen knows how to communicate and teach the science behind intoxication manslaughter to a jury. “The [intoxication manslaughter] science that I know, the state doesn’t understand," says Mark, who has also been certified as a Lawyer-Scientist by the American Chemical Society.

Don’t let just anyone fight your intoxication manslaughter charge. Get aggressive representation with Mark Thiessen at Thiessen Law Firm. Call 713-864-9000 and schedule your free consultation today.

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Mark Thiessen: Criminal Defense Attorney in Houston

“I love my job. If I won the lottery, I would still come back to work. Either you choose to plead guilty, or [you’re proven guilty] over my dead body.” That’s the kind of criminal defense attorney you want by your side during a trial, and that’s the kind of criminal defense attorney you get with Board Certified Criminal Lawyer Mark Thiessen at Thiessen Law Firm. Want one of the best DWI lawyers in Houston? Struggling to find a personal injury lawyer in Houston or a drug offense lawyer that will truly fight for you? Call Thiessen Law Firm at 713-864-9000 and schedule your free consultation today.

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Charged with DWI but not guilty?

"I’m protecting the constitution. I’m protecting people from police power. I want to make sure the police have done their job." Whether this is your first DWI offense in Houston, second DWI offense in Houston, third DWI offense in Houston... you name it, Board Certified Criminal Lawyer Mark Thiessen will still fight to make sure you won't get convicted based on evidence that's the product of shoddy police work. Do you have prior DWI offenses and facing additional charges? Let Mark Thiessen fight for you. Call 713-864-9000 and schedule your free consultation today.

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Thiessen Law Firm - Houston Trial Attorneys that Win

"I've fought for the underdog my entire life. It's just in me... Trial attorneys really are fighters. You're getting in the ring. This is the legal ring."

The attorneys at Thiessen Law Firm excel at fighting for the underdog and helping those clients who might otherwise wind up wrongly-convicted. Whether you need someone who will go to bat for you for DWI charges, intoxication manslaughter charges, sexual assault charges, a personal injury case, or child custody case, Board Certified Criminal Lawyer Mark Thiessen and associate attorneys Taly Thiessen, and Chris DeNuna aren't afraid to push for the outcome you want.

Put your future in the hands of a firm that succeeds. Call 713-864-9000 and schedule your free consultation today.

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Mark Thiessen - The Importance of a Trial Attorney

"You're not a lawyer just sitting there pushing papers." To Mark Thiessen of Thiessen Law Firm, being a trial attorney means jumping into the legal fighting ring and pushing hard to win your case. It takes a special kind of person to present a case - be it a DWI case, an intoxication manslaughter case, or a case for assault with a deadly weapon - and elicit emotion from a jury. The trial attorneys of Thiessen Law Firm, including Mark Thiessen -- a Board Certified Criminal Lawyer, American Chemical Society Certified Lawyer-Scientist, and Super Lawyer -- won't go down without a fight.

Get aggressive representation from some of the best trial attorneys in Texas. Call 713-864-9000 and schedule your free consultation today.