MARICOPA, Ariz. - s4story -- Jennings Haug Keleher McLeod Waterfall LLP (JKW) announces that Hillary Gagnon has joined the firm's Estate Planning, Trust, Probate and Administrative law practice in the firm's Phoenix office as a partner.

A certified specialist in estate and probate law by the State Bar of Arizona, Hillary focuses her practice exclusively on probate, trust and estate matters in Arizona. She advises clients on estate planning, estate and trust administration, guardianships and conservatorships, as well as throughout litigation and dispute resolution proceedings.

Hillary has extensive experience in guardianship and conservatorship matters involving vulnerable adults, incapacity issues, and complex family dynamics. She represents fiduciaries and family members in uncontested guardianship and conservatorship proceedings, including matters involving appointment of a guardian and conservator and on-going financial management and healthcare decision-making. Since 2011, she has served as court-appointed counsel and guardian ad litem for the Maricopa County Superior Court.

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In addition to her legal practice, Hillary serves as a mediator for contested probate and trust disputes. Drawing on her experience as a settlement conference judge pro tempore and her work in complex probate, trust, estate, guardianship and conservatorship matters, she helps parties evaluate their positions, identify practical paths to resolution and reach informed, workable and creative settlement solutions.

Hillary is active with several legal organizations, including the State Bar of Arizona's Probate and Trust Executive Council and the National Academy of Elder Law Attorneys. She is recognized annually as a top lawyer in Arizona in Trust and Estate Law and Litigation by Best Lawyers® in America and Southwest Super Lawyers. In April 2026 the State Bar of Arizona named Hillary Volunteer of the Month for her pro bono work.

Hillary earned her law degree from Suffolk University Law School in 1997 after graduating from Wheaton College with her bachelor's degree. In 2026 she participated in the Pepperdine University, Straus Institute for Dispute Resolution Mediation Training (40-hour).

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JKW is a full-service litigation and business law firm with extensive trial, litigation management, dispute resolution, and complex litigation experience. The firm's attorneys address a wide range of legal matters for businesses and individuals in the areas of antitrust, attorney regulation and ethics, appellate law, business law and litigation, banking, bankruptcy and creditors' rights, civil rights and constitutional law, commercial real estate, construction, corporate law, employment, environmental, comprehensive estate planning, trusts, probate and administration services, family law, fidelity and surety, financial services law matters, government relations and lobbying, insurance defense and coverage, medical and professional malpractice, municipal law, personal injury, energy regulatory matters and tribal law, as well as alternative dispute resolution. JKW has offices in Phoenix and Tucson, Arizona; Albuquerque, New Mexico; and Denver, Colorado to serve clients in the Southwest and throughout the United States. For additional information, visit jkwlawyers.com. (http://www.jhkmlaw.com/)