Heidi F. Purtzer

As a licensed veterinarian, Mark has the medical knowledge to help his clients get the results they deserve. Given his strong medical science background, Mark's practice focuses on tort law, including medical negligence, product liability, and other significant personal injury cases. He has nearly 35 years of experience litigating medical malpractice cases with victories including the landmark Edwards verdict and a transfusion-associated AIDS case that remains one of the largest personal inju...

For more than 25 years, Mark has offered intelligent and persistent advocacy for his clients involved in complex litigation matters. In the process, he has helped clients ranging from the State of Arizona to the Arizona Cardinals achieve their objectives, even when doing so required trips to the court of appeals to confirm correct rulings by a trial court or reverse errant ones. Mark’s thorough analysis of evidence in complex cases often leads to key connections among facts that aid in ...

Charles Callahan is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation, Insurance Law, Litigation - Insurance and Personal Injury Litigation - Defendants. Charles, who practices law in Phoenix, Arizona, has been recognized since 2020. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Charles is held by other top lawyers in the same geographic and legal practice area.

Daryl Manhart is an AV® Preeminent 5.0 out of 5 peer review rated attorney in Martindale-Hubbell. He is a senior shareholder handling commercial and real estate transactions, commercial litigation, and general business representation. Daryl is also the firm’s principal appellate attorney handling civil appeals, including special actions, in state and federal appellate courts in diverse practice areas, including cases before the U.S. Supreme Court. The firm’s trial lawyers regu...

Katherine Benveniste is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation. Katherine, who practices law in Phoenix, Arizona, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Katherine is held by other top lawyers in the same geographic and legal practice area.

Lindsay Fiore is a top attorney recognized by Best Lawyers in the practice area(s) of Employment Law - Management and Litigation - Labor and Employment. Lindsay, who practices law in Phoenix, Arizona, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Lindsay is held by other top lawyers in the same geographic and legal practice area.

James is a first-chair trial lawyer with the insight from serving as an Arizona trial judge for more than seven years. He focuses his practice on trial and appellate representation in complex commercial litigation and elections disputes. He also serves as arbitrator, mediator, and special master. Before joining the firm, James served as a judge on the Arizona Superior Court, where he presided over hundreds of jury trials, bench trials, evidentiary hearings, and oral arguments. The civil trial...

Steve Biddle has successfully defended public and private sector employers in employment-related litigation and regularly advises companies in all human resources matters. He represents management in issues related to: Occupational safety and health compliance Union organization Collective bargaining Unfair labor practices Union elections Compliance and litigation regarding employment discrimination, harassment and retaliation Wrongful termination Restrictive covenants Unemployment compensati...

Spencer G. Scharff represents and advises businesses, nonprofits, and individuals in complex litigation in state and federal courts. He is admitted to practice in California, Arizona, New York, and the District of Columbia, and has extensive experience in high-stakes commercial litigation, regulatory disputes, and appellate advocacy. Before founding Scharff PC, Spencer was a member of Goddard Law Office PLC, where he practiced alongside former Arizona Attorney General Terry Goddard. He previo...

Robert L. Schwartz has been practicing law for over 35 years, specializing in domestic relations. He is a member of the American, Arizona and Maricopa County Bar Associations. He is admitted to practice in the federal courts of New York, Arizona, Ninth Circuit Court of Appeals, and the U.S. Supreme Court. Mr. Schwartz is a fellow of the American Academy of Matrimonial Lawyers and former president of the Arizona chapter. He serves as a judge pro tem for the Superior Court of Maricopa County in...