Atty. Michael Sidney O'Brien

Atty. Michael Sidney O'Brien

Michael Sidney O'Brien is a lawyer. Michael has been licensed for 35 years.

Mustang Mustang 35 yrs experience 35 year
Call (405) 876-8441 Book Appointment

Profile Summary

About Michael Sidney O'Brien at a glance

Michael Sidney O'Brien is an attorney based in Mustang, Oklahoma. They have 35+ years of legal experience, licensed to practice since 1991. Admitted to practice in Oklahoma (1991). Serands clients in Mustang, OK and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Michael Sidney O'Brien is a lawyer
  • Michael has been licensed for 35 years
  • Michael practices in Mustang, OK

Jurisdictional Context

Why local counsel matters in Oklahoma

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

Looking for additional Oklahoma attorneys? Browse all attorneys in Mustang or all attorneys in Oklahoma.

Frequently Asked

Common questions about Michael Sidney O'Brien

Where is Michael Sidney O'Brien's law office located?
Michael Sidney O'Brien's law practice is located in Mustang, Oklahoma. You can contact the office directly through this profile page.
How long has Michael Sidney O'Brien practiced law?
Michael Sidney O'Brien has 35+ years of legal experience and has been licensed since 1991.
How can I contact Michael Sidney O'Brien for a consultation?
You can contact Michael Sidney 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

Oklahoma
Admitted: 1991

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