Atty. Mark G. McMahon

Atty. Mark G. McMahon

Mark G. McMahon is a lawyer practicing subrogation.

Clayton Clayton 47 yrs experience 47 year
Call (314) 860-4259 Book Appointment

Profile Summary

About Mark G. McMahon at a glance

Mark G. McMahon is a Member based in Clayton, Missouri, practicing at Law Offices of Mark G. McMahon. They have 47+ years of legal experience, licensed to practice since 1979. Admitted to practice in Missouri (1979). Educated at St. Louis University (J.D. A.B., 1979) and St. Louis University (A.B., 1976). Recognitions include AV Preeminent. Active member of National Association of Subrogation Professionals. Serands clients in Clayton, MO and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Mark G. McMahon is a lawyer practicing subrogation
  • Mark received a degree from St. Louis University in 1976, and has been licensed for 47 years
  • Mark practices at Law Offices of Mark G. McMahon in Clayton, MO

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 Clayton 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 Clayton or all attorneys in Missouri.

Frequently Asked

Common questions about Mark G. McMahon

Where is Mark G. McMahon's law office located?
Mark G. McMahon's law practice is located in Clayton, Missouri. The firm is Law Offices of Mark G. McMahon. You can contact the office directly through this profile page.
How long has Mark G. McMahon practiced law?
Mark G. McMahon has 47+ years of legal experience and has been licensed since 1979.
Where did Mark G. McMahon go to law school?
Mark G. McMahon earned their education at (J.D. A.B., 1979); (A.B., 1976).
How can I contact Mark G. McMahon for a consultation?
You can contact Mark G. McMahon 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.
What awards or recognition has Mark G. McMahon received?
Mark G. McMahon's notable recognition includes: AV Preeminent.

Practice Areas

Education

J.D. A.B.
St. Louis University
- 1979
A.B.
St. Louis University
- 1976

Awards

AV Preeminent

Bar Admissions

Missouri
Admitted: 1979

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