William H. Mack


  • New York
  • U.S. Court of Appeals, Second Circuit
  • U.S. District Court, Southern District of New York
  • U.S. District Court, Eastern District of New York
  • U.S. District Court, Western District of New York

  • “Avoiding the Minefields in New York Practice.” New York Law Journal May 2009

Columbia University School of Law, J.D., 2003

University of Pennsylvania, B.A., magna cum laude, 2000

William Mack is an attorney and Partner for the Commercial Litigation Law group in Davidoff Hutcher & Citron’s New York City office and focuses his practice on complex litigation and arbitration. Over the course of his two decade career, Mr. Mack has represented corporate, financial, and individual clients in multifaceted disputes (both domestic and international) involving a wide range of legal and business issues.

Notable Matters

Some of Mr. Mack’s successful client matters include representing:

  • Japanese hedge fund in a fraud action relating to a $200M+ investment in a life settlement fund;
  • Former law partners in a AAA arbitration relating to the partners’ departure from their firm;
  • Offshore Family Office in a commercial dispute relating to services rendered;
  • Biotech company in multifaceted litigation and governmental investigation relating to one of its products;
  • Engineering Construction firm in connection with a criminal investigation and civil litigation relating to a building fire;
  • Manufacturer in sales practices litigation;
  • Major Pharmaceutical company in an international insurance arbitration.


Mr. Mack spent the first eight years of his career in the litigation department of Skadden, Arps, Slate, Meagher & Flom LLP, where he learned to manage all aspects of complex litigation, and the importance of understanding a client’s business goals when providing litigation counseling.  Thereafter, he joined a litigation boutique in New York City, where he became a partner in 2016.  Mr. Mack is active in numerous not-for-profit corporations.  Bill is also an avid golfer and lives in Manhattan with his wife, Debra, and their two children.