Atty. Warren S. Koster

Atty. Warren S. Koster

Warren S. Koster is a Partner in our New York City office.

New York New York 50 yrs experience 50 year
Call (212) 805-4408 Book Appointment

Profile Summary

About Warren S. Koster at a glance

Warren S. Koster is a Partner based in New York, New York, practicing at Hall Booth Smith, P.C.. They have 50+ years of legal experience, licensed to practice since 1976. Their practice focuses on slip & fall, insurance, and appellate. Admitted to practice in New York U.S.D.C. Southern District of New York U.S.D.C. Eastern District of New York United States (1976). Educated at University of Virginia School of Law J.D. (—) and The American University B.A. International Relations, cum laude (—). Recognitions include AV Preeminent. Active member of CLM, Memberships •American Bar Association •New York State Bar Association •Claims and Litigation Management Alliance. Serands clients in New York, NY and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Warren S. Koster is a Partner in our New York City office
  • He also serves as Hiring Partner for the Northeast region, where he oversees associate attorney hiring endeavors
  • He comes to HBS with extensive experience in a wide variety of insurance defense litigation, including products liability, professional liability, medical malpractice, and general liability
  • Other areas of specialty include labor law, employment practices litigation, and insurance coverage issues
  • After law school, Warren joined the Kings County District Attorney’s Office as a prosecutor, where he was named one of the youngest deputy chiefs of the trial bureau in the office’s history
  • He continued his public service as Counsel to the Criminal Justice Coordinator to the Office of the Mayor of the City of New York
  • In this capacity, Warren advised the mayor’s office regarding a variety of issues concerning the mayor’s legislative agenda as it related to the criminal justice system
  • After moving into private practice, Warren was a founding partner of Koster, Brady & Nagler, LLP. Warren received his Juris Doctor from the University of Virginia and a Bachelor of Arts, cum laude, in International Relations from American University
  • Recognition •AV Preeminent Peer Review Rated, Martindale-Hubbell, 2023 •Moot Court Judge
  • New York Bar Associations, University of Virginia School of Law Publications Warren has published and lectured widely before industry and professional groups on issues related to many aspects of insurance defense litigation
  • His many seminar papers, topic presentations, and related memoranda include: •Sexual Harassment in the Workplace •Workplace Related Injuries •Unfair Claim Settlement Practices •New York No-Fault Law •Premises Liability: An Overview of Procedures and Issues in New York State Law •Actions Brought on Behalf of Decedents •Uninsured and Underinsured Motorist Coverage in New York •Workers’ Compensation or No-Fault: A Memorandum Outlining and Discussing the Interplay Between No-Fault Law and Workers’ Compensation Law •The Duty to Defend and Indemnify •New York Practice: A Memorandum Describing the Procedures and Structure of Law Practice in the State of New York •The Omnibus Workers’ Compensation Reform Act of 1996: An Overview •Avoidance, Investigation, Litigation and Adjustment of Bus Claims •The Duty to Defend and Indemnify Third-Party and No-Fault Claims In the Press HBS Announces New Regional Hiring Partners June 6, 2023 Hall Booth Smith is excited to announce its six new regional Hiring Partners to oversee and aid in associate attorney recruiting in their respective regions
  • These attorneys will help to ensure HBS continues to attract top talent as the firm expands
  • About the Partners Atlanta Partner Jacquelyn Smith Clarke will oversee all efforts as Lead Read Full Article

Practice Areas Explained

Warren S. Koster's Areas of Practice

Each practice area below reflects the types of cases Warren S. Koster handles, with a brief overview of what that area of law covers.

Slip & Fall / Premises Liability

Warren S. Koster is one of 29,473 slip & fall attorneys indexed nationally. Browse slip & fall attorneys in New York →

Insurance Law

Insurance attorneys for coverage disputes, bad faith claims, denied claims, and policy disputes.

Warren S. Koster is one of 121,912 insurance attorneys indexed nationally. Browse insurance attorneys in New York →

Appellate Practice

Appellate attorneys for civil and criminal appeals at state and federal court.

Warren S. Koster is one of 86,319 appellate attorneys indexed nationally. Browse appellate 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 Warren S. Koster

Where is Warren S. Koster's law office located?
Warren S. Koster's law practice is located in New York, New York. The firm is Hall Booth Smith, P.C.. You can contact the office directly through this profile page.
What practice areas does Warren S. Koster handle?
Warren S. Koster focuses on slip & fall, insurance, appellate. Each practice area listed reflects experience handling cases of that type in New York.
How long has Warren S. Koster practiced law?
Warren S. Koster has 50+ years of legal experience and has been licensed since 1976.
Where did Warren S. Koster go to law school?
Warren S. Koster earned their education at (—); (—).
How can I contact Warren S. Koster for a consultation?
You can contact Warren S. Koster 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.
What awards or recognition has Warren S. Koster received?
Warren S. Koster's notable recognition includes: AV Preeminent.

Education

University of Virginia School of Law J.D.
- In Progress
The American University B.A. International Relations, cum laude
- In Progress

Awards

AV Preeminent

Bar Admissions

New York U.S.D.C. Southern District of New York U.S.D.C. Eastern District of New York United States
Admitted: 1976

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