David C. Onuschak




TEL: 602.263.4476
FAX: 602.651.7582
Legal Assistant: Mary Creed

David Onuschak handles a variety of general liability defense cases, including personal injury and wrongful death, bad faith and extra-contractual liability, premises liability, automobile liability, and product liability. Before joining JSH, David worked as an associate attorney at two Valley AmLaw firms and an insurance defense firm. He brings significant experience managing all aspects commercial litigation cases, including conducting direct and cross examination of witnesses at trial and arbitration, taking and defending depositions, drafting motions and pleadings, conducting discovery, and managing legal teams for large document reviews and court filings. His litigation experience includes nationwide class actions, antitrust, employment law, and products liability.

During law school, David worked as a summer clerk for a Valley insurance defense firm where he gained experience in the areas of general civil and commercial litigation cases, including bad faith and coverage determinations. He also worked as a law clerk at the Arizona Attorney General’s in the financial remedies section. While there, David worked on civil RICO and asset forfeiture litigation cases.

An Arizona native, David earned both his law degree and undergraduate degree from ASU. In his free time, David enjoys swimming, tennis, playing guitar, and spending time with his family.

  • Participated in briefing and oral argument before the Ninth and Eleventh Circuit Court of Appeals.
  • Obtained summary judgment in indemnification action arising out of one of Arizona’s largest environmental cleanup of abandoned cathode ray tubes.
  • Represented multinational chemical company in internal investigation and document production for FTC approval of merger, which was granted.
  • Represented litigation funding company in suit against well-known California attorney and his celebrity wife for embezzlement of settlement funds.
  • Served as counsel for amicus curiae before Eleventh Circuit arising out of suspension of high school student for filming a music video off-campus during a weekend. School board reversed suspension and provided student and mother monetary compensation prior to oral argument before Eleventh Circuit.

Professional Recognition & Awards

  • Best Lawyers in America: Ones to Watch®, Commercial Litigation, Personal Injury Litigation – Defendants, 2023-2024

Presentations & Publications

  • “Arizona Supreme Court Rejects Challenge to Proposition 206,” Co-Author, August 2017
  • “2018 Revisions to the Arizona Civil Rules of Procedure,” Co-Author, July 2017


Arizona State University, Sandra Day O’Connor College of Law, J.D., 2016
Willard H. Pedrick Scholar for Academic Excellence
Trial Advocacy Fellow

Arizona State University, B.A., Political Science, magna cum laude, 2013
Dean’s List


Arizona, 2016
U.S. District Court of Arizona
U.S. Court of Appeals, Ninth Circuit
U.S. Court of Appeals, Eleventh Circuit