John J. Kastner, Jr.

John J. Kastner, Jr.

recognized lawyers icon Recognized in Best Lawyers since 2018
Awarded Practice Areas
Insurance Law Litigation - Insurance Litigation - Labor and Employment Personal Injury Litigation - Defendants Product Liability Litigation - Defendants
Awarded Practice Areas
Insurance Law Litigation - Insurance Litigation - Labor and Employment Personal Injury Litigation - Defendants Product Liability Litigation - Defendants
John J. Kastner, Jr.
John J. Kastner, Jr.
Tucson, AZ
Works at
The Mercaldo Law Firm

4 Best Lawyers awards

The Mercaldo Law Firm logo

Biography

Mr. Kastner’s practice is anchored in his belief that there is no substitute for hard work. He approaches all of his cases with that mantra in mind.

Based in Tucson, Kastner is a trial attorney whose practice extends throughout Arizona and encompasses insurance defense, insurance coverage, premises liability, municipal liability, catastrophic injury and wrongful death, commercial liability and professional negligence.

Kastner represents insurance carriers in first-party claims. He also represents self-insured businesses and individuals. His experience representing both insureds and insurers provides him with a unique perspective that is further diversified by his tenure as Judge Pro Tem for the Pima County Superior Court.

Kastner is AV Preeminent® Peer Review Rated™ by Martindale-Hubbell®, representing the highest rating in legal ability and ethical standards. He is also recognized by Best Lawyers® as one of the top attorneys in his field. He is an active member of the Federation of Defense & Corporate Counsel (FDCC), an organization comprised of leaders in the insurance and corporate defense bar. He currently serves on the Local Rules of Practice Advisory Committee for the Federal District Court of Arizona.

Works at
The Mercaldo Law Firm

4 Best Lawyers awards

The Mercaldo Law Firm logo

Locations

Education

  • Hamline University, J.D., graduated 1996

Client Testimonials

Awards & Focus

Recognized in The Best Lawyers in America® 2026 for work in:
  • Insurance Law
  • Litigation - Insurance
  • Litigation - Labor and Employment
  • Personal Injury Litigation - Defendants
  • Product Liability Litigation - Defendants
Additional Areas of Practice:
  • Administrative / Regulatory Law
  • Professional Malpractice Law - Defendants

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