Atty. Mark H. M. Sosnowsky

Atty. Mark H. M. Sosnowsky

Mark H. M.

Washington Washington 22 yrs experience 22 year
Call (771) 244-1984 Book Appointment

Profile Summary

About Mark H. M. Sosnowsky at a glance

Mark H. M. Sosnowsky is a Partner based in Washington, District of Columbia, practicing at Faegre Drinker Biddle & Reath LLP. They have 22+ years of legal experience, licensed to practice since 2004. Their practice focuses on criminal defense, business, white collar, whistleblower, and litigation. Admitted to practice in Pennsylvania (2004), Massachusetts (2005), New Jersey U.S. District Court, Eastern District of Virginia (2005), and District of Columbia (2008). Educated at Boston University School of Law (J.D., 2004) and The Pennsylvania State University (B.A., 1997). Serands clients in Washington, DC and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Mark H. M. Sosnowsky is a lawyer practicing business, antitrust, commercial litigation and 3 other areas of law
  • Mark received a B.A. degree from The Pennsylvania State University in 1997, and has been licensed for 22 years
  • Mark practices at Faegre Drinker Biddle & Reath LLP in Washington, DC

Practice Areas Explained

Mark H. M. Sosnowsky's Areas of Practice

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

Business & Corporate Law

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

Mark H. M. Sosnowsky is one of 501,317 business attorneys indexed nationally. Browse business attorneys in District of Columbia →

White Collar Crimes

Mark H. M. Sosnowsky is one of 20,025 white collar attorneys indexed nationally. Browse white collar attorneys in District of Columbia →

Whistleblower & Retaliation

Mark H. M. Sosnowsky is one of 3,552 whistleblower attorneys indexed nationally. Browse whistleblower attorneys in District of Columbia →

Civil Litigation

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

Mark H. M. Sosnowsky is one of 454,532 litigation attorneys indexed nationally. Browse litigation 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 H. M. Sosnowsky

Where is Mark H. M. Sosnowsky's law office located?
Mark H. M. Sosnowsky's law practice is located in Washington, District of Columbia. The firm is Faegre Drinker Biddle & Reath LLP. You can contact the office directly through this profile page.
What practice areas does Mark H. M. Sosnowsky handle?
Mark H. M. Sosnowsky focuses on criminal defense, business, white collar, whistleblower, litigation. Each practice area listed reflects experience handling cases of that type in District of Columbia.
How long has Mark H. M. Sosnowsky practiced law?
Mark H. M. Sosnowsky has 22+ years of legal experience and has been licensed since 2004.
Where did Mark H. M. Sosnowsky go to law school?
Mark H. M. Sosnowsky earned their education at (J.D., 2004); (B.A., 1997).
How can I contact Mark H. M. Sosnowsky for a consultation?
You can contact Mark H. M. Sosnowsky 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.
Boston University School of Law
- 2004
B.A.
The Pennsylvania State University
- 1997

Bar Admissions

Pennsylvania
Admitted: 2004
Massachusetts
Admitted: 2005
New Jersey U.S. District Court, Eastern District of Virginia
Admitted: 2005
District of Columbia
Admitted: 2008
Virginia
Admitted: 2009

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