Atty. Mark Allan Hammer

Atty. Mark Allan Hammer

Mark Allan Hammer is a lawyer practicing labor law, general commercial litigation, criminal defense and 20 other areas of law. Mark received a B.S. degree from University of Iowa in 1984, and has been licensed for 39 years.

St. Louis St. Louis 39 yrs experience 39 year
Call (816) 988-4671 Book Appointment

Profile Summary

About Mark Allan Hammer at a glance

Mark Allan Hammer is a Member based in St. Louis, Missouri. They have 39+ years of legal experience, licensed to practice since 1987. Their practice focuses on dui/dwi, criminal defense, employment, business, and federal crimes. Admitted to practice in California (1987), Washington (Inactive) (1990), Minnesota (1995), and Missouri (2009). Educated at University of Iowa (J.D., 1986) and University of Iowa (B.S., 1984). Serands clients in St. Louis, MO and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Mark Allan Hammer is a lawyer practicing labor law, general commercial litigation, criminal defense and 20 other areas of law
  • Mark received a B.S. degree from University of Iowa in 1984, and has been licensed for 39 years
  • Mark practices in St. Louis, MO

Practice Areas Explained

Mark Allan Hammer's Areas of Practice

Each practice area below reflects the types of cases Mark Allan Hammer 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.

Mark Allan Hammer 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.

Mark Allan Hammer is one of 214,270 criminal defense attorneys indexed nationally. Browse criminal defense attorneys in Missouri →

Employment Law

Employment lawyers represent workers in wrongful termination, discrimination, harassment, wage & hour disputes, and severance negotiations.

Mark Allan Hammer is one of 169,120 employment attorneys indexed nationally. Browse employment attorneys in Missouri →

Business & Corporate Law

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

Mark Allan Hammer is one of 501,317 business attorneys indexed nationally. Browse business attorneys in Missouri →

Federal Crimes

Mark Allan Hammer is one of 6,773 federal crimes attorneys indexed nationally. Browse federal crimes 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. Louis 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. Louis or all attorneys in Missouri.

Frequently Asked

Common questions about Mark Allan Hammer

Where is Mark Allan Hammer's law office located?
Mark Allan Hammer's law practice is located in St. Louis, Missouri. You can contact the office directly through this profile page.
What practice areas does Mark Allan Hammer handle?
Mark Allan Hammer focuses on dui/dwi, criminal defense, employment, business, federal crimes. Each practice area listed reflects experience handling cases of that type in Missouri.
How long has Mark Allan Hammer practiced law?
Mark Allan Hammer has 39+ years of legal experience and has been licensed since 1987.
Where did Mark Allan Hammer go to law school?
Mark Allan Hammer earned their education at (J.D., 1986); (B.S., 1984).
How can I contact Mark Allan Hammer for a consultation?
You can contact Mark Allan Hammer 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 Iowa
- 1986
B.S.
University of Iowa
- 1984

Bar Admissions

California
Admitted: 1987
Washington (Inactive)
Admitted: 1990
Minnesota
Admitted: 1995
Missouri
Admitted: 2009

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