William Ciszewski on light blue and white bokeh banner

William A. Ciszewski III


William counsels and represents clients in a variety of commercial disputes, including controversies involving corporate governance, institutional fiduciary responsibilities, banking relationships, and construction projects.  He has practiced in numerous state and federal courts. 

William has significant experience practicing insurance law and advising clients on risk management, and insurance placement.  He has litigated and resolved coverage disputes concerning a wide range of first- and third-party insurance contracts and involving diverse losses and claims.  While he began his career representing carriers, William’s insurance practice is now focused on policyholder rights and recovery.  In addition to litigating these matters, William regularly counsels clients on insurance requirements and issues attendant to all manner of business relationships and contracts, construction projects, corporate transactions, and cyber risks.    

William also assists the firm’s Office of General Counsel on various issues of professional responsibility and sits on the firm’s Security and Privacy Committee. 


  • Office of the U.S. Attorney for the Western District of New York


Cornell University, B.A.

Washington University in St. Louis, School of Law, J.D., cum laude


  • New York


  • Listed, Upstate New York Super Lawyers Rising Stars (Insurance Coverage) 2015 - 2022
  • Honor Scholar Award, Washington University
  • Former associate editor, Washington University Global Studies Law Review

News & Insights

Jump to Page

Necessary Cookies

Necessary cookies enable core functionality such as security, network management, and accessibility. You may disable these by changing your browser settings, but this may affect how the website functions.

Analytical Cookies

Analytical cookies help us improve our website by collecting and reporting information on its usage. We access and process information from these cookies at an aggregate level.

William A. Ciszewski III / News & Insights