Atty. Mark Daniel Cahn
Mark Daniel Cahn is a lawyer practicing civil practice, securities, antitrust and 1 other area of law. Mark received a B.A. degree from Tufts University in 1983, and has been licensed for 39 years.
Antitrust & More Attorney · Serving Washington, DC · 39+ Years Experience
Profile Summary
About Mark Daniel Cahn at a Glance
Mark Daniel Cahn is an Attorney based in Washington, District of Columbia, practicing at Wilmerhale. They have 39+ years of legal experience, licensed to practice since 1987. Their practice focuses on criminal defense, securities, and litigation. Admitted to practice in New York (1987) and District of Columbia (1988). Educated at Yale University (J.D., 1986) and Tufts University (B.A., 1983). Recognitions include AV Preeminent. Serves clients in Washington, DC and the surrounding metropolitan area.
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About Mark Daniel Cahn
- Mark Daniel Cahn is a lawyer practicing civil practice, securities, antitrust and 1 other area of law
- Mark received a B.A. degree from Tufts University in 1983, and has been licensed for 39 years
- Mark practices at WilmerHale in Washington, DC
Practice Areas Explained
Mark Daniel Cahn's Areas of Legal Practice
Each practice area below reflects the types of cases Mark Daniel Cahn handles, with a practical overview of what that area of law involves and how it may apply to your situation in Washington.
Criminal Defense in Washington
A criminal defense attorney protects your rights from arrest through trial. Find experienced lawyers handling DUI, drug, federal, theft, and violent-crime charges.
Mark Daniel Cahn is one of 212,605 criminal defense attorneys indexed nationally. Browse criminal defense attorneys in District of Columbia →
Securities Law in Washington
Mark Daniel Cahn is one of 64,075 securities attorneys indexed nationally. Browse securities attorneys in District of Columbia →
Civil Litigation in Washington
Civil litigation attorneys for breach of contract, business disputes, civil rights, and class action lawsuits.
Mark Daniel Cahn is one of 450,751 litigation attorneys indexed nationally. Browse litigation attorneys in District of Columbia →
Jurisdictional Context
Why Local Counsel Matters in Washington
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 venue, 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.
Washington Courts and Legal Process
Choosing a Washington-based attorney means your counsel already knows the local docketing timelines, preferred filing formats, and how individual judges typically rule on procedural motions — details that only come from practicing in this jurisdiction day after day. That local familiarity can translate to better strategy, faster filings, and fewer costly surprises.
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Professional Profile
Why Clients in Washington Choose Mark Daniel Cahn
Selecting an attorney is one of the most consequential decisions you can make when a legal matter arises. Below are the core qualities that distinguish Mark Daniel Cahn's practice in the field of criminal defense, securities, and litigation.
Decade-Tested Legal Experience
Mark Daniel Cahn brings 39+ years of hands-on legal practice — enough to have navigated the recurring fact patterns, procedural traps, and negotiation dynamics that shape case outcomes.
Multi-State Bar Admission
Licensed in New York and District of Columbia, Mark Daniel Cahn can represent clients in cases that span state lines or require counsel in multiple jurisdictions.
Broad Practice Area Coverage
Covering criminal defense, securities, and litigation, Mark Daniel Cahn can address the full spectrum of a client's legal needs without requiring referrals to separate specialists for each issue.
Local Presence in Washington
A Washington-based practice means Mark Daniel Cahn attends hearings in the same courthouses, knows the local clerks, and understands the unwritten scheduling norms that affect every case filed here.
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Mark Daniel Cahn's Practice Areas & Specializations
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