About John Douglas
John Douglas Wilenchik is an attorney admitted to practice in Arizona and before the Ninth Circuit, the Tenth Circuit and the U.S. Supreme Court. He is a member of the firm Wilenchik & Bartness, P.C., where he carries out litigation and appellate work on behalf of clients in state and federal matters. His standing before multiple federal courts reflects a practice that moves beyond a single courtroom or jurisdiction.
Wilenchik’s career has centered on courtroom litigation and appellate practice. He has worked on matters that require navigation of federal procedure and appellate rules. Rather than focusing on one niche, his work spans different phases of litigation — from pretrial motion practice to briefs on appeal. Those roles require careful legal analysis and an ability to present complex arguments in writing and orally to judges across jurisdictions.
He maintains current professional memberships that connect him to peers and continuing legal education. Those ties support the practical side of law: keeping up with evolving case law and procedural developments. Memberships also provide access to resources useful in preparing appellate briefs and handling multi-jurisdictional litigation.
Admitted to practice before the Ninth Circuit, the Tenth Circuit and the U.S. Supreme Court, Wilenchik is positioned to represent clients in federal appellate settings when cases move beyond trial courts. Admission to those forums permits him to file briefs and appear when appeals reach higher courts. In state matters, his practice in Arizona involves work typical of commercial and civil litigation, although the specifics of his client matters vary by case.
Colleagues and clients describe his approach as methodical. He breaks down complicated legal questions into discrete issues. That clarity matters in appeals, where framing a narrow question can determine review. In trials, he attends to procedural detail and the demands of federal practice. His role at Wilenchik & Bartness, P.C. places him among a team handling litigation that can cross state lines and raise federal questions.
As of 2026 he continues to accept and manage litigation and appellate matters through Wilenchik & Bartness, P.C., concentrating his practice on federal litigation and appellate representation.
