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Jason Cassidy helps businesses solve their problems with an eye toward heading off litigation before it develops. He offers his services to video game developers across the country to assist with the challenges facing the industry.

Jason’s experience gives him insight into the wide array of issues facing businesses, with attention to contract disputes and interpretation. He represents plaintiffs and defendants in securities-related litigation before the Financial Industry Regulatory Authority (FINRA) or in the courts.

He also helps clients resolve disputes involving data security breaches, defamation, contract interpretation, water rights, infrastructure and utilities, the False Claims Act, real estate, land use/zoning, discrimination, disability, and bankruptcy.


J.D., cum laude, Northwestern University Pritzker School of Law, Chicago, Illinois, 2013
B.M., Northwestern University, Evanston, Illinois, 2001, Vocal Performance


Named among Best Lawyers in America®: Ones to Watch for Commercial Litigation by Best Lawyers (2023-2024)

Named among Best Lawyers in America®: Ones to Watch for Litigation – Banking and Finance by Best Lawyers (2024)

Named among Best Lawyers in America®: Ones to Watch for Litigation – Environmental by Best Lawyers (2023-2024)

Named among Southwest Rising Stars by Thomson Reuters (2022-2023)

State Bar Licenses


Court Admissions

U.S. Court of Appeals, 9th Circuit
U.S. District Ct., District of Arizona


  • Represented local and national companies in litigation over how to do business in the era of COVID-19.
  • Defended one of Arizona’s largest securities brokerages in FINRA arbitrations.
  • Investigated anonymous emails and website postings defaming businesses and clients to identify the defamers and take down the offending content.
  • Serving as general counsel for an Arizona Community Facilities District.
  • Represented an Irrigation District in federal court litigation against a public utility involving the interpretation of a 100-year-old contract and the water rights to supply a large swath of the West Valley.
  • Led junior associates through nationwide compliance research projects, including the 50 states’ environmental and manufacturing requirements on behalf of a multi-billion dollar international company planning a U.S. launch of an innovative product.
  • Assisted a multistate electrical transmission project in ongoing compliance with state and federal environmental laws.
  • Negotiated a full-discharge settlement of a client’s student loans from the United States via an adversary bankruptcy proceeding. Jason was named to the Arizona Pro Bono Honor Roll in 2014 by the Arizona Bankruptcy Court for his work on this case.
  • Defended a group of healthcare workers in three related defamation actions involving the Federal Tort Claims Act, tribal law jurisdiction, and arguments of first impression regarding acts within the scope of employment.
  • Defended a national grocery store chain in a series of five lawsuits that sought to stop construction and operation of a new store in Surprise, Arizona. The store is now open for business.
  • Obtained an injunction against the United States to save a business from being shut down by an arbitrary agency determination.
  • Obtained a long-term restraining order against a university on behalf of a graduate student facing expulsion that would have violated the ADA and Rehabilitation Act.

Completed prior to joining Clark Hill.


Speaking Engagements

  • “The Federal False Claims Act, Or: Why It’s a Really Bad Idea to Defraud the Federal Government,” Law Firm CLE Program (June 2015)
  • “The Fair Debt Collection Practices Act: Correctly Collect Debt Without Defect, Neglect or Disrespect,” Law Firm CLE Program (February 2015)
  • “Pro Bono for Practice Development,” Law Firm CLE Program, Panelist( February 2014)