Atty. Trevor Clanton Theilen

Atty. Trevor Clanton Theilen

Mr. Trevor Clanton Theilen is a lawyer practicing criminal defense, felonies, drug offenses and 16 other areas of law.

Plano Plano 18 yrs experience 18 year
Call (945) 899-6301 Book Appointment

Profile Summary

About Trevor Clanton Theilen at a glance

Trevor Clanton Theilen is a Member based in Plano, Texas, practicing at Trevor Theilen Law Office. They have 18+ years of legal experience, licensed to practice since 2008. Their practice focuses on dui/dwi, drug crimes, criminal defense, ip, and ip licensing. Admitted to practice in Texas (2008). Educated at Baylor University (J.D., 2008). Serands clients in Plano, TX and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Mr. Trevor Clanton Theilen is a lawyer practicing criminal defense, felonies, drug offenses and 16 other areas of law
  • Trevor has been licensed for 18 years
  • Trevor practices at Trevor Theilen Law Office in Plano, TX

Practice Areas Explained

Trevor Clanton Theilen's Areas of Practice

Each practice area below reflects the types of cases Trevor Clanton Theilen handles, with a brief overview of what that area of law covers.

DUI / DWI Defense

Find experienced DUI and DWI defense attorneys near you. Compare verified profiles, read client reviews, and consult about your case for free.

Trevor Clanton Theilen is one of 29,976 dui/dwi attorneys indexed nationally. Browse dui/dwi attorneys in Texas →

Drug Crimes

Trevor Clanton Theilen is one of 6,966 drug crimes attorneys indexed nationally. Browse drug crimes attorneys in Texas →

Criminal Defense

A criminal defense attorney protects your rights from arrest through trial. Find experienced lawyers handling DUI, drug, federal, theft, and violent-crime charges.

Trevor Clanton Theilen is one of 214,270 criminal defense attorneys indexed nationally. Browse criminal defense attorneys in Texas →

Intellectual Property

IP attorneys protect inventions, brands, and creative work through patent prosecution, trademark registration, copyright, and trade-secret enforcement.

Trevor Clanton Theilen is one of 106,079 ip attorneys indexed nationally. Browse ip attorneys in Texas →

IP Licensing

Trevor Clanton Theilen is one of 2,744 ip licensing attorneys indexed nationally. Browse ip licensing attorneys in Texas →

Jurisdictional Context

Why local counsel matters in Texas

Practicing law in Texas. Legal matters in Texas are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Plano are typically filed in the local municipal court or the appropriate Texas state district court, depending on subject matter and amount in controversy. An attorney licensed in Texas brings working knowledge of local procedural deadlines, judicial practices in this andnue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in Texas courts without local counsel or pro hac vice admission.

Looking for additional Texas attorneys? Browse all attorneys in Plano or all attorneys in Texas.

Frequently Asked

Common questions about Trevor Clanton Theilen

Where is Trevor Clanton Theilen's law office located?
Trevor Clanton Theilen's law practice is located in Plano, Texas. The firm is Trevor Theilen Law Office. You can contact the office directly through this profile page.
What practice areas does Trevor Clanton Theilen handle?
Trevor Clanton Theilen focuses on dui/dwi, drug crimes, criminal defense, ip, ip licensing. Each practice area listed reflects experience handling cases of that type in Texas.
How long has Trevor Clanton Theilen practiced law?
Trevor Clanton Theilen has 18+ years of legal experience and has been licensed since 2008.
Where did Trevor Clanton Theilen go to law school?
Trevor Clanton Theilen earned their education at (J.D., 2008).
How can I contact Trevor Clanton Theilen for a consultation?
You can contact Trevor Clanton Theilen directly through this profile page. Click "Ask the Attorney" to submit a question, or "Schedule a Consultation" to book a meeting. Most claimed-profile attorneys respond within one business day.

Education

J.D.
Baylor University
- 2008

Bar Admissions

Texas
Admitted: 2008

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