Atty. Mark Steven Seidenfeld

Atty. Mark Steven Seidenfeld

Mark Steven Seidenfeld is a lawyer practicing taxation, civil practice, international law and 2 other areas of law. Mark received a B.S. degree from Sarah Lawrence College in 1976, and has been licensed for 46 years.

New York New York 46 yrs experience 46 year
Call (301) 450-0704 Book Appointment

Profile Summary

About Mark Steven Seidenfeld at a glance

Mark Steven Seidenfeld is a Member based in New York, New York, practicing at Mark Seidenfeld, P.C.. They have 46+ years of legal experience, licensed to practice since 1980. Their practice focuses on business, real estate, tax, litigation, and international. Admitted to practice in New York (1980) and U.S. Tax Court and U.S. District Court, Southern and Eastern Districts of New York (1981). Educated at Benjamin Cardozo School of Law (J.D. New, 1979) and Sarah Lawrence College (B.S., 1976). Active member of New York State and American Bar Associations The Association of Trial Lawyers of America. Serands clients in New York, NY and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Mark Steven Seidenfeld is a lawyer practicing taxation, civil practice, international law and 2 other areas of law
  • Mark received a B.S. degree from Sarah Lawrence College in 1976, and has been licensed for 46 years
  • Mark practices at Mark Seidenfeld, P.C. in New York, NY

Practice Areas Explained

Mark Steven Seidenfeld's Areas of Practice

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

Business & Corporate Law

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

Mark Steven Seidenfeld is one of 501,317 business attorneys indexed nationally. Browse business attorneys in New York →

Real Estate Law

Real estate attorneys handle home purchases, sales, commercial transactions, title disputes, and landlord-tenant matters.

Mark Steven Seidenfeld is one of 316,149 real estate attorneys indexed nationally. Browse real estate attorneys in New York →

Tax Law

Tax attorneys handle IRS audits, tax debt, international tax, estate planning, and tax court litigation.

Mark Steven Seidenfeld is one of 85,302 tax attorneys indexed nationally. Browse tax attorneys in New York →

Civil Litigation

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

Mark Steven Seidenfeld is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in New York →

International Law

International law attorneys for cross-border transactions, trade, foreign investment, and treaties.

Mark Steven Seidenfeld is one of 40,133 international attorneys indexed nationally. Browse international 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 New York 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 New York or all attorneys in New York.

Frequently Asked

Common questions about Mark Steven Seidenfeld

Where is Mark Steven Seidenfeld's law office located?
Mark Steven Seidenfeld's law practice is located in New York, New York. The firm is Mark Seidenfeld, P.C.. You can contact the office directly through this profile page.
What practice areas does Mark Steven Seidenfeld handle?
Mark Steven Seidenfeld focuses on business, real estate, tax, litigation, international. Each practice area listed reflects experience handling cases of that type in New York.
How long has Mark Steven Seidenfeld practiced law?
Mark Steven Seidenfeld has 46+ years of legal experience and has been licensed since 1980.
Where did Mark Steven Seidenfeld go to law school?
Mark Steven Seidenfeld earned their education at (J.D. New, 1979); (B.S., 1976).
How can I contact Mark Steven Seidenfeld for a consultation?
You can contact Mark Steven Seidenfeld 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. New
Benjamin Cardozo School of Law
- 1979
B.S.
Sarah Lawrence College
- 1976

Bar Admissions

New York
Admitted: 1980
U.S. Tax Court and U.S. District Court, Southern and Eastern Districts of New York
Admitted: 1981

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