About
Arbitrator & Mediator · Case Closure, LLC.
Mark J. Bunim is a nationally recognized arbitrator and mediator with more than four decades of experience resolving complex insurance coverage and high-stakes commercial disputes. He has served as sole arbitrator, panel chair, and panel member in over 150 arbitrations, including matters with amounts in dispute reaching $1 billion.
Mark is particularly known for his deep expertise in insurance coverage disputes across all policy types, as well as complex business, partnership, and technology-related conflicts. His background as a former law firm managing partner and insurance litigation leader provides him with a comprehensive understanding of both the legal and business dynamics driving disputes.
Licensed in New York courts since 1976, Mark founded Case Closure, LLC. in 2005, bringing to alternative dispute resolution the same rigor, precision, and command of the law that defined his distinguished career as a practicing attorney. His practice is both domestic and international in scope.
Mark was the founding and first co-chair of the New York State Bar Association Insurance Dispute Committee of the Dispute Resolution Section from 2022 to 2025.
Mark is a Fellow of the College of Commercial Arbitrators and a Diplomate member of the National Academy of Distinguished Neutrals, having been inducted in 2012. He was named 2013 Top Rated Lawyer in Insurance Law by the American Lawyer and the New York Law Journal.
Mark J. Bunim, Esq.
Founder & Principal
Arbitration & ADR Experience
Mediation & Arbitration Approach
Mark J. Bunim brings a structured, disciplined, and highly experienced approach to dispute resolution, shaped by decades of handling complex, high-value matters.
Mediation & Arbitration Approach
Mark has contributed articles on dispute resolution and insurance law to the New York Law Journal and Litigation Management Magazine.
Mark has presented at bar association events and professional conferences across the United States, sharing his expertise in arbitration, mediation, and insurance law.
Professional Associations & Recognitions
Guiding Principles for Arbitration
Mark J. Bunim, Esq. believes in maintaining a schedule-adherent and efficient process, ensuring that each matter moves forward with purpose and discipline. He focuses on the overall practicality of the issues in dispute, bringing a grounded, results-oriented perspective to every case. Through careful examination of both the facts and the applicable law, he develops well-reasoned approaches tailored to each situation. His extensive experience with all types of award processes further supports his ability to navigate complex matters with clarity and confidence.
— Mark J. Bunim, Esq.
Guiding Principles for Mediation
"You go to Court to make a point; you come to mediation to make a deal."
— Mark J. Bunim, Esq.
