Wm. Charles Thomson


Chuck has substantial experience with commercial disputes involving contracts or business torts, the defense of professional negligence claims, and environmental litigation in both state and federal courts. Having handled civil litigation matters in Phoenix and throughout Arizona for more than 35 years, Chuck has extensive experience in commercial and business disputes of all types, including breach of contract and fiduciary duties, fraud and misrepresentation, civil RICO, and securities litigation and FINRA arbitrations.  He has defended numerous professional liability claims for physicians, attorneys and architects.  As a former Hearing Officer for the State Bar and a member of the State Bar Professionalism Committee, Chuck is also available to consult regarding ethical and professionalism issues. Chuck also has experience in environmental litigation, including CERCLA and state law equivalents, and related toxic tort actions. As a long-time Judge Pro Tem, Chuck has conducted many settlement conferences and is available as mediator to assist in private mediations.

Representative Experience

  • Represented a national bank against allegations that its Trust Department engaged in breaches of fiduciary duty, constructive fraud, tortious interference with contract, aiding and abetting and civil conspiracy, and caused damages alleged to be in excess of $50 million; and thereafter secured a full compromise of all claims after beginning trial of the dispute to a jury in the Arizona Superior Court.
  • Represented and advised a national bank in a series of actions filed in the Arizona Superior Court alleging breaches of fiduciary duty, violation of securities laws, and other business torts by bank investment managers.
  • Securing title to commercial real estate for a developer by pursuing a claim of equitable subrogation.
  • Litigated in the Arizona Superior Court and before FINRA on behalf of a multinational financial services company and one of its subsidiaries in a dispute with a former affiliate in response to allegations of breach of contract, wrongful termination, injury to business reputation and intentional interference with contracts.
  • Defended a Fortune 500 international construction company with respect to claims allegedly in excess of $100 million arising out of a failed Arizona hotel/retail/commercial development project; and obtained summary judgment on all claims.
  • Represented the seller in the Arizona Superior Court in both the defense and pursuit of multiple claims arising out of a failed residential development project in Gilbert, Arizona.
  • Tried to favorable judgment in Bankruptcy Court a dispute over ownership to the access road to a prestigious Arizona golf resort and development; sustained the judgment on appeal in the Ninth Circuit; and defeated a Petition for Certiorari to the United States Supreme Court.
  • Defended an Arizona public utility in multiple cases seeking to recover damages for wrongful death, bodily injury and property damage.
  • Has argued multiple cases in the Arizona Appellate Courts and the Ninth Circuit.

Bar & Court Admissions

  • Arizona, 1975
  • U.S. District Court, District of Arizona, 1975
  • U.S. Court of Appeals, Ninth Circuit, 1976

Associations & Memberships

  • State Bar of Arizona, Member
  • State Bar of Arizona Professionalism Committee, Chair
  • Maricopa County Bar Association, Member
  • Maricopa County Bar Association Membership Committee
  • Arizona Association of Defense Counsel, Member and Past President, 1975-2009
  • Arizona Foundation for Legal Services & Education, Sustaining Patron
  • Maricopa County Bar Foundation, Charter Benefactor and Past Chair

Honors & Awards

  • AV® Preeminent™ Peer Review Rating, Martindale-Hubbell
  • The Best Lawyers in America®, Commercial Litigation, 2013-2020
  • Top 50 Pro Bono Attorneys in Arizona, 2014
  • Arizona Finest Lawyers, Sustaining Member, 2014-Present