William K. Kirrane


William is an experienced civil litigator who brings over two decades of litigation experience, representing clients in complex liability exposure cases with a focus on catastrophic injury and large exposure property damage claims. He is well-versed in handling cases from inception through trial. His experience extends to briefing and arguing appeals, with a track record of achieving successful trial and appellate results in New York.

William has defended property owners, general contractors, construction managers, and municipalities in casualty cases, including construction accidents, premises liability claims, product liability claims, construction defect claims, transportation, and toxic torts accidents. William also has experience in contract disputes and labor and employment cases, defending employers against claims based on racial discrimination, sexual harassment, and wrongful termination.

William earned his law degree from St. John's University School of Law in 2001 and his bachelor's degree from Queens College in 1997.



Cozen O'Connor Grows Litigation Team in New York with Five New Partners

October 15, 2013

Cozen O’Connor continues to increase the depth of the firm’s litigation capabilities in New York with the recent hiring of five new partners. Partners residing in the firm's New York office who have joined in recent months include John J. Sullivan, Michael B. de Leeuw, Patrick B. Sardino, William K. Kirrane and Adam I. Stein.

Events & Seminars

Past Events

Critical Issues in Litigation – 2016

November 03, 2016 - New York, NY

Critical Issues in Litigation – 2015

May 20, 2015 - New York, NY

Industry Sectors


  • St. John's University School of Law, J.D., 2001
  • Queen's University, B.A., 1997
  • New York
  • U.S. District Court -- Eastern District of New York
  • U.S. District Court -- Southern District of New York