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Theilen, Trevor

Trevor Theilen - Plano, TX

Attorney at Trevor Theilen Law Office

Criminal Defense Lawyers in Plano, TX

PO Box 863674 Plano, TX 75086

  • Free Consultation

Plano Criminal Defense Lawyer

Updated: 08/14/2026

Areas of Practice

  • Criminal Defense
  • Criminal Law
  • Administrative Law
  • Texas Professional License Defense
  • License Disciplinary Proceedings
  • License Fines and Penalties
  • License Suspension, Probation, and Revocation
  • Professional Licensing Issues Arising from Criminal Charges
  • Criminal Defense for Licensed Professionals
  • Professional License Defense for Individuals and Small Businesses

Attorney Information

Overview

Experience. Resilience. Focus.

I’m Trevor Theilen. For over 14 years, I practiced criminal law and administrative law (“license law”) as a Texas prosecutor. Today, I’m laser focused on protecting your freedom and your right to work.

I became a lawyer to go to court and win. I chose criminal law and license law because they give me the chance to do that regularly for individuals and small businesses. I am not afraid of judges, and I love juries. I will carefully explore and explain all of your options, but if a trial or a hearing is your best chance at success I don’t hesitate to jump in and fight for you.

My license defense work spans across all of Texas - I work remotely when possible, and travel when necessary.

My criminal defense work focuses on North Texas counties (Collin, Dallas, Denton, Rockwall, Tarrant, Kaufman, & Hunt) since criminal work usually requires in-person court appearances.

Every client and case are unique. Each one deserves representation crafted around its specific needs. My clients and I nail down exactly what they hope to achieve before we move forward. I regularly update my clients on their cases, and I expect them to keep me updated as well.

I mainly communicate with clients on the phone, through texts and emails, or on video. This approach allows me the flexibility to work with clients across the entire state and at uncommon hours. If we need to meet in person, my office is in beautiful downtown McKinney - I’m happy to meet you there by appointment.

My time as a criminal prosecutor plus my 12 years as a license prosecutor for the Texas Department of Licensing and Regulation (also known as "TDLR”) give me experience and perspective that few other attorneys can offer. Most criminal defense attorneys practice little to no administrative law involving licenses. Most administrative law lawyers do not work in criminal courts regularly.

I spent 6 years using criminal law and administrative law for a licensing agency in special license courts. For licensed professionals facing criminal charges or licensing punishments like fines, license suspension, probation, or revocation, I can pull back the curtain and chart the best course forward. When it’s time to show who you really are in a courtroom or to a licensing board, you’ll be glad to have me on your side.

I’m Trevor Theilen. Call me now, so I can get started.


Education

Legal Education

  • Baylor University School of Law, Waco, Texas, 2008
    J.D.

Past Positions

  • Senior Prosecutor, Texas Department of Licensing & Regulation, 2020 - 2023
  • Enforcement Prosecutor, Texas Department of Licensing & Regulation, 2011 - 2020
  • Assistant District Attorney, Anderson County Criminal District Attorney’s Office, 2009 - 2011

Languages

  • English

Classes and Seminars

  • “I Can Still Work After I Get Out, Right?” Licensed Professionals in Texas Before and After A Criminal Case, Advanced Texas Administrative Law Seminar, 2022

Bar Admissions

  • Texas, 2008

Other Affiliations

  • Texas Criminal Defense Lawyers Association, Nexus Committee, 2024 - Present
  • Collin County Criminal Defense Lawyers Association, 2023 - Present
  • Texas Criminal Defense Lawyers Association, 2023 - Present

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Plano, TX

PO Box 863674
Plano, TX 75086

Directions

Phone Number: 945-351-9982

Email: Send a message

  • Credit Cards Accepted
  • Free Consultations
  • Virtual Appointments

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