Charles (Chas) Wirken’s extensive appellate experience, coupled with his expertise, has earned the respect of his peers and appellate judges, as indicated by his election as a Fellow in the American Academy of Appellate Lawyers, inclusion in Best Lawyers in America® and Southwest Super Lawyers® in the Appellate Law Category, and recognition in Chambers USA: America’s Leading Lawyers for Litigation: Appellate in 2021, 2022, 2023 and 2024. Chas was named one of the Top 100 Lawyers in Arizona in 2015, 2018, 2021, and 2024 by AZ Business Magazine and was a Best Lawyers® Lawyer of the Year in 2016, 2018, 2021, and 2024.

Having briefed and argued over 200 appeals involving a broad range of cases and issues in state and federal appellate courts, Chas has become a valuable resource to trial lawyers inside and outside Gust Rosenfeld. He has served as a judge pro tem of the Arizona Court of Appeals and co-founded the State Bar’s Appellate Practice Section, which shares his knowledge with other lawyers as a faculty member of the Institute.

In 2009, Chas successfully petitioned the United States Supreme Court to hear the United Student Aid Funds, Inc. case vs. Espinosa. He was the primary draftsman of the briefs, leading to a favorable decision that settled the procedural requirements for the discharge of student loan debt in bankruptcy cases. In 2017, he briefed and argued the case of Howell v. Howell at the high court.

The other focus of Chas’s practice is the resolution of business disputes. He has tried a wide variety of commercial disputes with judges and juries in state and federal courts. His national reputation for the litigation of cases involving franchises, dealers, distributors, and licensors is reinforced by his listing in The Best Lawyers in America® Franchising Law category. Since 1980, Chas has represented both franchisors and franchisees from various franchise systems in contract, business tort, intellectual property, and government regulation disputes typically encountered by such clients.

Chas brings to his advocacy the perspective of years of experience as a judge pro tem of the Maricopa County Superior Court and as a former arbitrator for the American Arbitration Association. As President of the State Bar of Arizona, Chas re-established the Arizona College of Trial Advocacy, where he annually serves as a faculty member.

In 2013, Chas was elected to membership in The American Law Institute, the leading independent organization in the United States, producing scholarly work to clarify, modernize, and otherwise improve the law. In recognition of his many contributions to the law and justice in Arizona, Chas was inducted into the Maricopa County Bar Association Hall of Fame in 2015.

Chas is AV® Preeminent™ rated by Martindale-Hubbell,® representing the highest rating in legal ability and ethical standards.

Professional Associations

  • American Academy of Appellate Lawyers (Fellow)
  • American Bar Association
    • House of Delegates (2010-2022)
    • Member, Council of Appellate Lawyers (2001-present)
    • Member, Forum on Franchising (1984-present)
  • American Law Institute (Elected Member)
  • Arizona Court of Appeals (judge pro tem, 1984-85, 1992-94, 1998-99)
  • Maricopa County Superior Court (judge pro tem, 1986-present)
  • American Arbitration Association (Panel of Arbitrators, 1986-2005)
  • State Bar of Arizona
    • President (2004-2005)
    • Board of Governors (1995-2006)
    • Appellate Practice Section (Executive Council 1995-1996)
    • Trial Practice Section (Chair 2001-2002)
    • Civil Practice and Procedure Committee (1977-2003, 2006-present, Chair 2006-2007)
    • Client Protection Fund Board of Trustees (Chair 2012-2018)
    • Discipline Oversight Committee (Chair 2002-2004)
  • Maricopa County Bar Association (President, 1989-1990)
  • East Valley Bar Association (President, 1979-1980)
  • Lorna Lockwood Inn of Court (Co-President 2011-2012)
  • University of Arizona Law College Association Board of Directors (2008-2020, 2021-present)

Professional Recognition

  • American Academy of Appellate Lawyers (Fellow)
  • Litigation Counsel of America (Senior Fellow)
  • The Best Lawyers in America®, Appellate Practice; Franchise Law (2003-2024)
  • Lawyer of the Year Phoenix, Franchise Law (2016, 2018, 2021 and 2024)
  • Chambers USA: America’s Leading Lawyers for Business® Litigation: Appellate (2021-2024)
  • Southwest Super Lawyers®, Appellate (2007-2024)
  • Phoenix Magazine 2023 Top Lawyers – Appellate Law
  • State Bar of Arizona President’s Award (2019)
  • Maricopa County Bar Association Member of the Year (2019)
  • Top 100 Lawyers in Arizona, AZ Business (2015, 2018, 2021)
  • Maricopa County Bar Association Hall of Fame (2015)
  • American Law Institute, Elected Member
  • Top Rated Lawyers in Commercial Litigation (2013)
  • Top Attorneys in Arizona (2006)
  • Community Legal Services pro bono award (1997)
  • Lawyers Who Make a Difference, State Bar of Arizona (1995)
  • AV® Preeminent™ rated by Martindale-Hubbell®

Representative Matters

  • Howell v. Howell, 361 Ariz. 936 (2015), 581 U.S. 214 (2017)
  • Lazar v. Kroncke, 862 F. 3d 1186 (9th Cir. 2017), cert. denied, 138 S.Ct. 2647 (2018)
  • Cassinelli v. Cassinelli, 138 S.Ct. 69 (2017), cert. denied
  • United Student Aid Funds, Inc. v. Espinosa, 559 U.S. 260 (2010)
  • Dodge v. Graville, 533 U.S. 945 (2001)
  • Smith Plumbing Co., Inc. v. Aetna Cas. & Sur. Co., 149 Ariz. 524, cert. denied, 479 U.S. 987 (1986)
  • Kalway v. Calabria Ranch HOA, LLC, 252 Ariz. 532 (2022)
  • Ray and Lindsay-11, LLC v. Town of Gilbert, 499 P.3d 335 (App. 2021)
  • In re Restated Trust of Crystal H. West, 249 Ariz. 355 (App. 2020)
  • Price v. City of Mesa, 236 Ariz. 267 (App. 2014)
  • Weitz Co., LLC v. Heth, 235 Ariz. 405 (2014)
  • In re Estate of Gardner, 230 Ariz. 329 (App. 2012)
  • Sourcecorp, Inc. v. Norcutt, 229 Ariz. 270 (2012)
  • In re Estate of Olson, 223 Ariz. 441 (App. 2010)
  • In re Hamm, 211 Ariz. 458 (2005)
  • Pleak v. Entrada Prop. Owners’ Ass’n, 207 Ariz. 418 (2004)
  • Maricopa County v. Barfield, 206 Ariz. 109 (App. 2003)
  • Mealey v. Arndt, 206 Ariz. 218 (App. 2003)
  • White Mountain Apache Tribe v. Smith Plumbing Co., Inc., 856 F.2d 1301 (9th Cir. 1988)
  • Henderson v. Duncan, 779 F.2d 1421, 3 Fed.R.Serv.3d 1547 (9th Cir. 1986)
  • Campbell v. Westdahl, 148 Ariz. 432 (App. 1985)
  • Birds Int’l Corp. v. Arizona Maint. Co., Inc., 135 Ariz. 545 (App. 1983)
  • Harris v. Arizona Bd. of Regents, 528 F. Supp. 987 (1981)
  • Nelson v. Cannon, 126 Ariz. 381 (App. 1980)
  • Matter of Chase’s Estate, 125 Ariz. 270 (App. 1980)

Presentations & Publications

  • “Oral Argument,” Arizona Appellate Handbook 2.0, Chap. Ten, State Bar of Arizona (“2020)
  • “Giving Back: Senior Lawyers and Pro Bono,” Arizona Attorney (November 2019)
  • “Honorable Advocacy: New Paradigm or Mere Wish?” Arizona Attorney (May 2005)
  • “Creating Skilled Trial Advocates,” Arizona Attorney (May 2002)
  • “Values Worth Protecting – Facing a New Millennium,” Arizona Attorney (October 2001)
  • “Contract Disclaimer Does Not Bar FTC Monetary Award,” The Franchise Lawyer (Fall 1999)

Community Involvement

  • Mesa Judicial Advisory Board (2018-2021)
  • Mesa Rotary Club (President; recipient 2018 Service Above Self Award)
  • Mesa United Way (campaign co-chair 2010-2011)
  • Maricopa County Citizen’s Jail Oversight Committee (1999-2007)
  • Commission on Salaries for Elective State Officers (1995-1996)
  • Arizona Town Hall (delegate)

Legal Updates & Firm News

Aug 23, 2023 Press Release

The Best Lawyers in America® 2024 Names Gust Rosenfeld Attorneys “Lawyer of the Year”; “Ones to Watch”; and “Best Lawyers”

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Aug 23, 2023 Press Release

Gust Rosenfeld Lawyers Named Phoenix Magazine 2023 Top Lawyer

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