Atty. Mark Leonard Groothuis

Atty. Mark Leonard Groothuis

Mark Leonard Groothuis is a lawyer practicing criminal law, criminal defense. Mark received a B.S. degree from New York University in 1963, and has been licensed for 59 years.

Hempstead Hempstead 59 yrs experience 59 year
Call (516) 786-4939 Book Appointment

Profile Summary

About Mark Leonard Groothuis at a glance

Mark Leonard Groothuis is an Associate based in Hempstead, New York, practicing at Hirsch & Hirsch, LLP. They have 59+ years of legal experience, licensed to practice since 1967. Their practice focuses on criminal defense. Admitted to practice in New York (1967), U.S. District Court, Southern District of New York (1967), and U.S. District Court, Eastern District of New York (1967). Educated at New York Law School (LL.B., 1966) and New York University (B.S., 1963). Recognitions include AV Preeminent. Active member of Nassau County and Suffolk County Bar Associations Nassau Lawyers Association Criminal Courts Bar Association. Serands clients in Hempstead, NY and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Mark Leonard Groothuis is a lawyer practicing criminal law, criminal defense
  • Mark received a B.S. degree from New York University in 1963, and has been licensed for 59 years
  • Mark practices at Hirsch & Hirsch, LLP in Hempstead, NY

Practice Areas Explained

Mark Leonard Groothuis's Areas of Practice

Each practice area below reflects the types of cases Mark Leonard Groothuis handles, with a brief overview of what that area of law covers.

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 Leonard Groothuis is one of 214,271 criminal defense attorneys indexed nationally. Browse criminal defense attorneys in New York →

Jurisdictional Context

Why local counsel matters in New York

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

Looking for additional New York attorneys? Browse all attorneys in Hempstead or all attorneys in New York.

Frequently Asked

Common questions about Mark Leonard Groothuis

Where is Mark Leonard Groothuis's law office located?
Mark Leonard Groothuis's law practice is located in Hempstead, New York. The firm is Hirsch & Hirsch, LLP. You can contact the office directly through this profile page.
What practice areas does Mark Leonard Groothuis handle?
Mark Leonard Groothuis focuses on criminal defense. Each practice area listed reflects experience handling cases of that type in New York.
How long has Mark Leonard Groothuis practiced law?
Mark Leonard Groothuis has 59+ years of legal experience and has been licensed since 1967.
Where did Mark Leonard Groothuis go to law school?
Mark Leonard Groothuis earned their education at (LL.B., 1966); (B.S., 1963).
How can I contact Mark Leonard Groothuis for a consultation?
You can contact Mark Leonard Groothuis 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 Leonard Groothuis received?
Mark Leonard Groothuis's notable recognition includes: AV Preeminent.

Education

LL.B.
New York Law School
- 1966
B.S.
New York University
- 1963

Awards

AV Preeminent

Bar Admissions

New York
Admitted: 1967
U.S. District Court, Southern District of New York
Admitted: 1967
U.S. District Court, Eastern District of New York
Admitted: 1967

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