International Law & More Attorney · Serving Washington, DC · 36+ Years Experience
Profile Summary
About Mark S. Willis at a Glance
Mark S. Willis is a Partner based in Washington, District of Columbia, practicing at Labaton Sucharow Llp. They have 36+ years of legal experience, licensed to practice since 1990. Their practice focuses on securities, litigation, consumer, and international. Admitted to practice in Massachusetts (1990), District of Columbia (1999), and U.S. District Court: District of Columbia (1999). Educated at Georgetown University Law Center (LL.M. International, 1993) and Brigham Young University (B.A., 1986). Serves clients in Washington, DC and the surrounding metropolitan area.
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About Mark S. Willis
- Mr. Mark S. Willis is a lawyer practicing securities litigation, non-u.s. securities litigation, international law and 3 other areas of law
- Mark received a B.A. degree from Brigham Young University in 1986, and has been licensed for 36 years
- Mark practices at Labaton Sucharow LLP in Washington, DC
Practice Areas Explained
Mark S. Willis's Areas of Legal Practice
Each practice area below reflects the types of cases Mark S. Willis handles, with a practical overview of what that area of law involves and how it may apply to your situation in Washington.
Securities Law in Washington
Mark S. Willis 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 S. Willis is one of 450,751 litigation attorneys indexed nationally. Browse litigation attorneys in District of Columbia →
Consumer Protection in Washington
Consumer protection attorneys for fraud, lemon law, debt harassment, and deceptive trade practices.
Mark S. Willis is one of 50,226 consumer attorneys indexed nationally. Browse consumer attorneys in District of Columbia →
International Law in Washington
International law attorneys for cross-border transactions, trade, foreign investment, and treaties.
Mark S. Willis is one of 39,787 international attorneys indexed nationally. Browse international 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.
Looking for additional District of Columbia attorneys? Browse all attorneys in Washington or all attorneys in District of Columbia.
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Professional Profile
Why Clients in Washington Choose Mark S. Willis
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 S. Willis's practice in the field of securities, litigation, consumer, and international.
Decade-Tested Legal Experience
Mark S. Willis brings 36+ 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 Massachusetts, District of Columbia, and U.S. District Court: District of Columbia, Mark S. Willis can represent clients in cases that span state lines or require counsel in multiple jurisdictions.
Broad Practice Area Coverage
Covering securities, litigation, and consumer, Mark S. Willis 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 S. Willis 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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How People Find Mark S. Willis Online
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Mark S. Willis's Practice Areas & Specializations
Education & Law School Background
Bar Admissions & Licensed Jurisdictions
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