Atty. James Leon Ostaszewski

Atty. James Leon Ostaszewski

James Leon Ostaszewski is a lawyer practicing constitutional law, banking law, securities litigation. James received a B.S. degree from St.

New York New York 16 yrs experience 16 year
Call (347) 979-1885 Book Appointment

Profile Summary

About James Leon Ostaszewski at a glance

James Leon Ostaszewski is an Associate based in New York, New York, practicing at Zamansky LLC. They have 16+ years of legal experience, licensed to practice since 2010. Their practice focuses on business, litigation, and civil rights. Admitted to practice in New York (2010) and U.S. District Court, Southern District of New York (2011). Educated at Brooklyn Law School (J.D., 2009) and St. John's University (B.S., 2006). Serands clients in New York, NY and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • James Leon Ostaszewski is a lawyer practicing constitutional law, banking law, securities litigation
  • James received a B.S. degree from St. John's University in 2006, and has been licensed for 16 years
  • James practices at Zamansky LLC in New York, NY

Practice Areas Explained

James Leon Ostaszewski's Areas of Practice

Each practice area below reflects the types of cases James Leon Ostaszewski 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.

James Leon Ostaszewski is one of 501,317 business attorneys indexed nationally. Browse business attorneys in New York →

Civil Litigation

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

James Leon Ostaszewski is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in New York →

Civil Rights

Civil rights attorneys for discrimination, police misconduct, constitutional rights, and civil liberties cases.

James Leon Ostaszewski is one of 70,245 civil rights attorneys indexed nationally. Browse civil rights 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 James Leon Ostaszewski

Where is James Leon Ostaszewski's law office located?
James Leon Ostaszewski's law practice is located in New York, New York. The firm is Zamansky LLC. You can contact the office directly through this profile page.
What practice areas does James Leon Ostaszewski handle?
James Leon Ostaszewski focuses on business, litigation, civil rights. Each practice area listed reflects experience handling cases of that type in New York.
How long has James Leon Ostaszewski practiced law?
James Leon Ostaszewski has 16+ years of legal experience and has been licensed since 2010.
Where did James Leon Ostaszewski go to law school?
James Leon Ostaszewski earned their education at (J.D., 2009); (B.S., 2006).
How can I contact James Leon Ostaszewski for a consultation?
You can contact James Leon Ostaszewski 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.
Brooklyn Law School
- 2009
B.S.
St. John's University
- 2006

Bar Admissions

New York
Admitted: 2010
U.S. District Court, Southern District of New York
Admitted: 2011

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