Atty. Sean Thomas Tierney

Atty. Sean Thomas Tierney

Sean Thomas Tierney is a lawyer practicing criminal defense, family, business and 1 other area of law. Sean received a B.A. degree from St.

St. Peters St. Peters 18 yrs experience 18 year
Call (314) 944-5124 Book Appointment

Profile Summary

About Sean Thomas Tierney at a glance

Sean Thomas Tierney is a Member based in St. Peters, Missouri, practicing at Westerfeld Law Group, LLC. They have 18+ years of legal experience, licensed to practice since 2008. Their practice focuses on dui/dwi, criminal defense, family law, and business. Admitted to practice in Missouri (2008). Educated at University of Missouri at Kansas City (J.D., 2007) and St. Mary's University B.A. (—). Serands clients in St. Peters, MO and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Sean Thomas Tierney is a lawyer practicing criminal defense, family, business and 1 other area of law
  • Sean received a B.A. degree from St. Mary's University, and has been licensed for 18 years
  • Sean practices at Westerfeld Law Group, LLC in St. Peters, MO

Practice Areas Explained

Sean Thomas Tierney's Areas of Practice

Each practice area below reflects the types of cases Sean Thomas Tierney 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.

Sean Thomas Tierney is one of 29,976 dui/dwi attorneys indexed nationally. Browse dui/dwi attorneys in Missouri →

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.

Sean Thomas Tierney is one of 214,270 criminal defense attorneys indexed nationally. Browse criminal defense attorneys in Missouri →

Family Law

Family law attorneys handle divorce, child custody, child support, adoption, prenups, and protective orders. Find verified family lawyers near you.

Sean Thomas Tierney is one of 187,066 family law attorneys indexed nationally. Browse family law attorneys in Missouri →

Business & Corporate Law

Business attorneys advise founders and growing companies on entity formation, contracts, financing, M&A, and dispute resolution.

Sean Thomas Tierney is one of 501,317 business attorneys indexed nationally. Browse business attorneys in Missouri →

Jurisdictional Context

Why local counsel matters in Missouri

Practicing law in Missouri. Legal matters in Missouri are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in St. Peters are typically filed in the local municipal court or the appropriate Missouri state district court, depending on subject matter and amount in controversy. An attorney licensed in Missouri 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 Missouri courts without local counsel or pro hac vice admission.

Looking for additional Missouri attorneys? Browse all attorneys in St. Peters or all attorneys in Missouri.

Frequently Asked

Common questions about Sean Thomas Tierney

Where is Sean Thomas Tierney's law office located?
Sean Thomas Tierney's law practice is located in St. Peters, Missouri. The firm is Westerfeld Law Group, LLC. You can contact the office directly through this profile page.
What practice areas does Sean Thomas Tierney handle?
Sean Thomas Tierney focuses on dui/dwi, criminal defense, family law, business. Each practice area listed reflects experience handling cases of that type in Missouri.
How long has Sean Thomas Tierney practiced law?
Sean Thomas Tierney has 18+ years of legal experience and has been licensed since 2008.
Where did Sean Thomas Tierney go to law school?
Sean Thomas Tierney earned their education at (J.D., 2007); (—).
How can I contact Sean Thomas Tierney for a consultation?
You can contact Sean Thomas Tierney 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.
University of Missouri at Kansas City
- 2007
St. Mary's University B.A.
- In Progress

Bar Admissions

Missouri
Admitted: 2008

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