Atty. Mark J. Biros

Atty. Mark J. Biros

Mark J. Biros is a lawyer practicing white collar criminal defense law, civil litigation, health and hospital law and 2 other areas of law.

Washington Washington 53 yrs experience 53 year
Call (443) 909-4791 Book Appointment

Profile Summary

About Mark J. Biros at a glance

Mark J. Biros is a Member based in Washington, District of Columbia, practicing at Proskauer Rose Llp. They have 53+ years of legal experience, licensed to practice since 1973. Their practice focuses on criminal defense, white collar, litigation, government, and health care. Admitted to practice in District of Columbia (1973) and Pennsylvania (1974). Educated at Georgetown University Law Center (J.D., 1973) and Princeton University (A.B., 1970). Recognitions include AV Preeminent. Serands clients in Washington, DC and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Mark J. Biros is a lawyer practicing white collar criminal defense law, civil litigation, health and hospital law and 2 other areas of law
  • Mark received a A.B. degree from Princeton University in 1970, and has been licensed for 53 years
  • Mark practices at Proskauer Rose LLP in Washington, DC and 1 other location

Practice Areas Explained

Mark J. Biros's Areas of Practice

Each practice area below reflects the types of cases Mark J. Biros 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 J. Biros is one of 214,270 criminal defense attorneys indexed nationally. Browse criminal defense attorneys in District of Columbia →

White Collar Crimes

Mark J. Biros is one of 20,025 white collar attorneys indexed nationally. Browse white collar attorneys in District of Columbia →

Civil Litigation

Civil litigation attorneys for breach of contract, business disputes, civil rights, and class action lawsuits.

Mark J. Biros is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in District of Columbia →

Government & Administrative Law

Attorneys for administrative law, agency hearings, government contracts, licensing, and public benefits.

Mark J. Biros is one of 132,225 government attorneys indexed nationally. Browse government attorneys in District of Columbia →

Health Care Law

Health care attorneys for HIPAA, Medicare, Medicaid, regulatory compliance, and medical licensing matters.

Mark J. Biros is one of 66,735 health care attorneys indexed nationally. Browse health care attorneys in District of Columbia →

Jurisdictional Context

Why local counsel matters in District of Columbia

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

Looking for additional District of Columbia attorneys? Browse all attorneys in Washington or all attorneys in District of Columbia.

Frequently Asked

Common questions about Mark J. Biros

Where is Mark J. Biros's law office located?
Mark J. Biros's law practice is located in Washington, District of Columbia. The firm is Proskauer Rose Llp. You can contact the office directly through this profile page.
What practice areas does Mark J. Biros handle?
Mark J. Biros focuses on criminal defense, white collar, litigation, government, health care. Each practice area listed reflects experience handling cases of that type in District of Columbia.
How long has Mark J. Biros practiced law?
Mark J. Biros has 53+ years of legal experience and has been licensed since 1973.
Where did Mark J. Biros go to law school?
Mark J. Biros earned their education at (J.D., 1973); (A.B., 1970).
How can I contact Mark J. Biros for a consultation?
You can contact Mark J. Biros 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 J. Biros received?
Mark J. Biros's notable recognition includes: AV Preeminent.

Education

J.D.
Georgetown University Law Center
- 1973
A.B.
Princeton University
- 1970

Awards

AV Preeminent

Bar Admissions

District of Columbia
Admitted: 1973
Pennsylvania
Admitted: 1974

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