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Mark Ryan Thiessen
Mark Ryan Thiessen is a lawyer in Houston, TX who works for The Thiessen Law Firm. Practice areas include Criminal, Family, Litigation: Personal Injury. Board certifications include Criminal Law. Licensed in Texas since 2003. Graduated from South Texas College of Law in 2003.
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Law school
Bar admission
Office
Disciplinary
MT
Mark Ryan Thiessen
The Thiessen Law FirmHouston, TX·22 years licensed
Claim profileContact attorney
Mark Ryan Thiessen is a lawyer in Houston, TX who works for The Thiessen Law Firm. Practice areas include Criminal, Family, Litigation: Personal Injury. Board certifications include Criminal Law. Licensed in Texas since 2003. Graduated from South Texas College of Law in 2003.
Law school
South Texas College of Law
Class of 2003
Bar admission
2003
State Bar of TX · #24042025
Office
733 E 12th 1/2 St
Houston, TX 77008
Disciplinary
None on record
Clean since admission
Case data
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Practice, courts & credentials
Practice areas3 listed
CriminalFamilyLitigation: Personal Injury
Courts admitted3 total
Fifth Circuit Court of Appeals
Texas Southern District Court
US Supreme Court
Credentials1 certified
Criminal Law
Board certified 2018
No public disciplinary history
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Last refreshed Aug 2026