Wilenchik & Bartness

Wilenchik & Bartness, P.C. provides aggressive, reasoned counsel to individuals and companies of all sizes in the areas of complex federal, state and criminal litigation and mediation.

Title with Firm: 
Managing Partner

Years at Firm: 30

Contact Phone: 
(602) 606-2810

Other Practice-Area Expertise: 
Business, Real Estate, White-Collar Criminal Litigation

Dennis I. Wilenchik Esq.

General Civil Litigation

Dennis Wilenchik’s practice focuses on civil litigation with an emphasis on civil business, real estate, white collar criminal litigation, and state and federal appeals. He is a nationally certified civil trial advocate and is a top-notch courtroom trial attorney. He has been a member of both the Trial Practice and Evidence committees of the American Bar Association. 

He has spoken at numerous seminars on trial practice, evidence and construction defects for various professional organizations and groups, and he has contributed to national publications on trial evidence and mold. Wilenchik is rated Martindale-Hubbell AV®-Preeminent™, the highest rating available under the Martindale Hubbell rating system, and is listed in the national Bar Register of Preeminent Lawyers. He has been named “Best Trial Lawyer” by Arizona Foothills Magazine, is a member of the State Bar of Arizona, Top Rated Lawyers, Lawyers of Distinction, Rue’s Best Attorneys of America, Arizona’s Finest Lawyers and The Fellows of the American Bar Association. He is a diplomate of the Hasting’s College of Law Trial Advocacy Program and the National College of Advocacy Trial Advocacy Program. 

Wilenchik serves as a commercial arbitrator for the American Arbitration Association and was appointed by Governor Babbitt to the Arizona Board of Physical Therapist Examiners, on which he served for five years, ending his term as treasurer. He was later appointed by the Governor to the Board of Naturopathic Physicians’ Medical Examiners. He was elected as chairman to the Town of Cave Creek Planning and Zoning Commission. Wilenchik has also served as a member of the Arizona Bar Associations Young Lawyers’ Practice Manual Committee, which established a civil practice manual for the State Bar of Arizona. He also serves on the advisory board of the Arizona Department of Real Estate. 

Title with Firm:

Years at Firm:

Contact Phone:
(602) 606-2810

Other Practice-Area Expertise:
Business Law, Election Law, Civil Rights

John D. “Jack” Wilenchik


John “Jack” Wilenchik is a litigation and trial lawyer. He handles cases in business and employment law, civil rights, law enforcement matters, victim’s rights matters and tax audits/deficiencies. He has been named to the national Superlawyers list of “Top Rated Attorneys” by Thomson Reuters. In 2018, he obtained the largest jury verdict in Mohave County history (at $8 million, including $1.768 million in punitive damages). In 2017, he was the first person to be contacted by the White House with the news that President Donald J. Trump had issued his first pardon, and to receive an official copy of the pardon (on behalf of Joseph M. Arpaio). Wilenchik practices in all Arizona state and federal courts, the Ninth and Tenth Circuit Court of Appeals, the United States Supreme Court, and United States Tax Court. 

Wilenchik is committed to charity, in both his personal and professional life. He has taken on various cases and causes over the years pro bono, including a unique case on behalf of a child victim that reached the United States Supreme Court. In late 2016, Wilenchik authored a bill to protect child victims that was introduced into the Senate by United States Senators Jeff Flake (R-AZ) and Dianne Feinstein (D-CA) as co-sponsors. Wilenchik has served as a volunteer attorney for the National Association for the Advancement of Colored People, the Rutherford Institute and the Goldwater Institute, as well as a liaison and special advisor to the Maricopa County Community Legal Services Volunteer Lawyers Program. Wilenchik has also served as a regular volunteer for the Wills for Heroes program, which prepares wills for law enforcement and first responders. Less than one week after taking the bar exam, Wilenchik donated a kidney to his mother, attorney Becky Bartness. 

About Wilenchik & Bartness

Company Name:
Wilenchik & Bartness, P.C.

Main Local Office Address:
The Wilenchik & Bartness Building
2810 North Third St., 
Phoenix, AZ 85004



Number of Offices in Metro Phoenix: 1

City Nationally Headquartered:

Managing Partner:
Dennis I. Wilenchik Esq.

Year Established Locally:

Top Practice Areas:
Business litigation, real estate litigation, white collar criminal litigation, election law, appeals

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