Atty. Mathieu William O'Brien

Atty. Mathieu William O'Brien

Mathieu William O'Brien is a lawyer. Mathieu has been licensed for 6 years.

Philadelphia Philadelphia 6 yrs experience 6 year
Call (914) 829-3584 Book Appointment

Profile Summary

About Mathieu William O'Brien at a glance

Mathieu William O'Brien is an attorney based in Philadelphia, Pennsylvania. They have 6+ years of legal experience, licensed to practice since 2020. Admitted to practice in Pennsylvania (2020). Serands clients in Philadelphia, PA and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Mathieu William O'Brien is a lawyer
  • Mathieu has been licensed for 6 years
  • Mathieu practices in Philadelphia, PA

Jurisdictional Context

Why local counsel matters in Pennsylvania

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

Looking for additional Pennsylvania attorneys? Browse all attorneys in Philadelphia or all attorneys in Pennsylvania.

Frequently Asked

Common questions about Mathieu William O'Brien

Where is Mathieu William O'Brien's law office located?
Mathieu William O'Brien's law practice is located in Philadelphia, Pennsylvania. You can contact the office directly through this profile page.
How long has Mathieu William O'Brien practiced law?
Mathieu William O'Brien has 6+ years of legal experience and has been licensed since 2020.
How can I contact Mathieu William O'Brien for a consultation?
You can contact Mathieu William O'Brien 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.

Bar Admissions

Pennsylvania
Admitted: 2020

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