Robert Mandel, named one of the Best Lawyers in America®, focuses on complex commercial litigation and appellate matters. Mr. Mandel focuses most often on business, constitutional, and public law disputes including appeals of final judgments, preliminary injunctions, and other interlocutory decrees, petitions for writs of certiorari and mandamus, certified questions from the federal courts, appellate motion practice, and the representation of amici curiae.

In addition to his notable appellate practice, Mr. Mandel has also represented a wide variety of public and private companies and individuals in complex commercial lawsuits in the federal and state trial courts involving a wide array of claims including fraud, negligent misrepresentation, breach of fiduciary duty, intentional interference with existing and prospective business relations, unfair competition, false advertising, trademark infringement, shareholder and corporate claims, conversion, misappropriation of trade secrets, and breach of private and public contracts, including restrictive covenants, unjust enrichment, fraudulent conveyance, and construction design defect.  He has also handled litigation and appellate matters on behalf of clients in Arizona’s emerging cannabis industry.

Prior to joining Zuber Lawler, Mr. Mandel was a shareholder at Greenberg Traurig LLP, where he was team leader of the firm’s Phoenix Appellate Team, before co-founding Mandel Young, known as Arizona’s first appellate boutique.

Mr. Mandel writes and speaks frequently on a wide variety of trial- and appellate-related issues.

Professional Accomplishments

  • Secured landmark decision at Arizona Supreme Court holding that the Arizona Medical Marijuana Act (AMMA) immunizes not merely the medical use of the dried flowers of the cannabis plant but also of products manufactured from the plant’s extracted resin; the Court consequently reversed the felony convictions and sentences of registered qualifying patient Rodney Christopher Jones, a young African American man who served two-and-one-half years behind bars for his possession of a small sample of extract acquired at a state-licensed medical marijuana dispensary.
  • Persuaded U.S. Court of Appeals for the Ninth Circuit to vacate natural gas distributor’s $60 million punitive damages award against former chairman of Arizona Corporation Commission for alleged tortious interference in proposed merger; subsequently persuaded Ninth Circuit to vacate $4 million punitive damages remittitur, resulting in another published decision reducing award to $1.2 million; convinced trial court to stay enforcement of final judgment without supersedeas bond.
  • Secured crucial victory at Arizona Supreme Court for lender, loan servicer, and mortgage-backed securitization trustee in certified question proceeding to resolve disputed questions pertaining to non-judicial foreclosures of distressed residential and commercial properties; crafted principal brief, coordinated with amici curiae counsel, engaged in extensive motion practice, and presented oral argument, all within seven weeks of engagement.
  • Co-chaired and prevailed in three-week, bet-the-company retrial of breach of contract and tortious interference claims in Arizona federal district court on behalf of electronic bingo game device manufacturer after persuading Ninth Circuit to reverse seven-figure judgment in favor of former distributor based on trial court’s commission of several errors, including exclusion of probative evidence; victory marked culmination of eight years of litigation, including successful representation of client in three other Ninth Circuit appeals.
  • Co-chaired and prevailed in two-week, bet-the-company jury trial in Arizona federal district court on behalf of multinational photo radar enforcement industry leader after persuading district court to dismiss two-thirds of rival’s false advertising claims seeking tens of millions of dollars in purported damages.
  • Secured new-trial order pursuant to Rule 59(a) on behalf of defendants in multimillion dollar action for violations of the Uniform Fraudulent Transfers Act after jury trial in five yearlong litigation; currently representing those defendants in appeal arising from that order.
  • Negotiated favorable settlement on behalf of one of the world’s largest supply chain software development companies in former customer’s lawsuit for breach of contract and the implied covenant of good faith and fair dealing after three years of litigation in the U.S. District Court for the District of Arizona; obtained contempt order from U.S. District Court for the Northern District of Texas against non-party design consultant for discovery transgressions.
  • Repelled Maricopa County Regional School District Superintendent’s petition for review and special action petition to Arizona Supreme Court seeking vacatur of superior court order appointing three-member panel of experts to assume control of school district’s affairs in wake of her indictment.


Affiliations & Activities

  • Chair, Task Force on Written Appellate Advocacy, Appellate Practice Section, Lawyers Division, American Bar Association 2008–2010
  • Co-Chair, Membership Recruitment Subcommittee, Appellate Practice Section, Lawyers Division, American Bar Association 2008–2010
  • Member, Board of Directors, Crisis Nursery – Phoenix 2005-2012


Honors and Recognition

  • Best Lawyers in America© 2020 Edition, Appellate Practice 2019-present
  • Martindale-Hubbell AV® Preeminent™ (5.0 out of 5.0) 2007–present
  •  Member, Law360 “Appellate Practice Group of the Year” 2010
  • Member and Steering Committee, Arizona’s Finest Lawyers 2013-2014
  • Recommended, PLC Dispute Resolution Handbook, Practical Law Company 2008–2011



  • Faculty, Cannabis Law 2019, State Bar of Arizona (SBA) Annual Convention, Phoenix, AZ (June 26, 2019)
  • Faculty, Breaking Down the Case for Extracts, Sandra Day O’Connor College of Law, Phoenix, AZ (May 17, 2019)
  • Faculty, Cannabis Law Updates 2018, State Bar of Arizona (SBA) Annual Convention, Phoenix, AZ (June 27, 2018)
  • Faculty, Enhancing Punitive Damages and Judgments to Their Constitutional Limits, State Bar of Arizona (SBA), Phoenix, AZ (Dec. 6, 2017)
  • Faculty, Appellate Process and Legal Developments, 2017 Arizona City Attorneys Association Annual (ACCA) Summer Conference, Flagstaff, AZ (June 2, 2017)
  • Author, Persuasion, Experience & The Context-Driven Brief, Attorney at Law Magazine (Greater Phoenix Edition), Target Market Media (2014)
  • Author, On Appellate Practice: Deciding Whether to Bring a Petition for Review, Attorney at Law Magazine (Greater Phoenix Edition), Target Market Media (2014)
  • Author, APPELLATE ENGAGEMENT: Why and When You Should Retain Appellate Counsel, Attorney at Law Magazine (Greater Phoenix Edition), Target Market Media (2013)
  • Author, Amended ARCAP 7(a)(2) Affords Civil Litigants Greater Access to the Arizona Court of Appeals, Attorney at Law Magazine (Greater Phoenix Edition), Target Market Media (2013
  • Author, LEGAL MISCONCEPTIONS: An Appellate Lawyer’s Perspective on Conversion Under Rule 12(b), Attorney at Law Magazine (Greater Phoenix Edition), Target Market Media (2013)
  • Author, When is a Punitive Damages Award Too Big? A Five-Part Analytical Framework for Appeals and PostJudgment Motions, Attorney at Law Magazine (Greater Phoenix Edition), Target Market Media (2013)
  • Author, Beware the Law of the Case, Attorney at Law Magazine (Greater Phoenix Edition), Target Market Media (2012)
  • Columnist, Ask the Legal Professionals (Appellate), The Phoenix Business Journal (2011)