Experienced Litigators. Proven Trial Lawyers. Dedicated Advocacy.

Founded in 1991 by Dennis I. Wilenchik and Becky Bartness, Wilenchik & Bartness is an established litigation and trial law firm representing clients in complex civil and criminal matters. For more than three decades, the firm has delivered sophisticated legal representation backed by extensive courtroom experience, strategic thinking, and a commitment to protecting its clients’ interests.

Litigation and trial advocacy are at the heart of our practice. We represent individuals, businesses, and organizations in significant legal disputes, bringing experience and determination to every stage of the legal process. Our attorneys handle complex civil litigation, business and commercial disputes, real estate and construction litigation, and criminal defense matters. From developing case strategy and navigating pretrial proceedings to arbitration, mediation, and courtroom trials, we bring the preparation, judgment, and advocacy necessary to pursue the best possible outcome for our clients.

A Foundation of Experience and Professional Distinction

Our founding attorneys bring decades of legal experience and nationally recognized professional credentials.

Dennis I. Wilenchik is the founding member of Wilenchik & Bartness and a highly experienced civil and criminal trial attorney. Before establishing the firm in 1991, he served as a senior partner and litigation leader at Squire, Sanders & Dempsey LLP, now known as Squire Patton Boggs, an international law firm. His experience in complex litigation and business disputes helped establish the foundation for the firm’s high-level, client-focused approach to legal representation.

Mr. Wilenchik holds the Martindale-Hubbell AV®-Preeminent™ rating, the highest available under its peer-review rating system, and is listed in the national Bar Register of Preeminent Lawyers. He has been recognized as a Super Lawyer in Business Litigation by Thomson Reuters, is a member of Arizona’s Finest Lawyers, and a Fellow of the American Bar Foundation. He is also a nationally certified Civil Trial and Civil Practice Advocate through the National Board of Trial Advocacy. His professional leadership includes serving as Chairman of the State Bar of Arizona’s Trial Practice Section. He is admitted to practice in Arizona and Texas state and federal courts, New York state courts, the Ninth Circuit Court of Appeals, and the United States Supreme Court.

Becky Bartness also holds the Martindale-Hubbell AV®-Preeminent™ rating and is listed in the Bar Register of Preeminent Women Lawyers. A real estate specialist for more than 15 years, her practice also includes commercial arbitration and mediation. Her experience provides clients with valuable perspective in resolving complex legal and business disputes. Ms. Bartness is admitted to practice in all Arizona state and federal courts and the Ninth Circuit Court of Appeals.

At Wilenchik & Bartness, litigation is more than a practice area. It is the foundation of our firm. We combine the experience and capabilities of a seasoned litigation practice with a focused, personalized approach to client representation. Whether a matter calls for aggressive courtroom advocacy, strategic negotiation, or experienced legal counsel, our commitment remains the same: to protect our clients’ interests and pursue results through skilled, determined representation.