They’re Fast & Effective, With an Edge in Technology

Meet The Attorneys To Call When A Case Seems Difficult or Unwinnable

Meet Daryl Williams & Daniel Mestaz

They use their custom technology (the Chron) and three-step battleplan to prepare for victory from day one..

They are also known for taking on big entities, including the government and massive corporations. As a result, they are often engaged to take on the Goliath opponent.

You can view some of those cases here.

So, who are these two attorneys who make winning look so easy?

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Daryl Williams

Daryl Williams

Daryl is a true bet-the-company commercial trial lawyer with a decades long track record of multi-million dollar verdicts against some of the largest law firms in the country. After making history by winning the biggest jury verdict in Arizona for that year, he’s been one of the most respected attorneys in the West. His sterling reputation precedes him.

He also treats you, the client, with respect. When you talk to him, you’ll instantly notice that he is a man who cares deeply. However, don’t let his constant smile and enthusiasm for your case fool you.

To your opponent, he is aggressive and relentless, while being erudite and a master tactician. He can take on the biggest firms in America. Nobody is too big, too intimidating, or too well funded for Daryl. He’ll look them in the eye, and they will know that they are in for a fight.

He is an AV-rated trial lawyer with over 40 years of experience. He has conducted more than 100 jury trials involving commercial litigation matters, including contracts, real estate, securities fraud, construction defects, antitrust, unfair trade practices, and insurance bad faith.

Daryl is also a senior fellow of the Litigation Counsel of America, an invitation-only trial lawyer honorary society that is limited to one half of one percent of American lawyers.

Not only that, he single-handedly developed the technology we refer to as ‘The Chron’. No other law firm in the world has access to this technology. You can read more about it on our How We Win page.

He is also an active, commercially-licensed pilot with multi-engine and instrument ratings, has more than 4,000 hours of flight time, and is a volunteer for the Veterans Airlift Command that provides transportation to combat wounded and their families.

A true Renaissance man, Daryl is also a classical pianist, woodworker, computer programmer, and Old Testament scholar, who became fluent in Spanish by listening to tapes on his way to work

Memberships & Associations

  • National Business Aviation Association (NBAA
  • Aircraft Owners and Pilots Association (AOPA)
  • Arizona School for the Arts (Charter School), Board of Advisors, 2012-Present
  • Ballet & Friends, a §501(c)(3) — An organization supporting ballet for young men and women, 2008-Present
  • American Diabetes Association, Board of Directors and Research Policy Committee, 2002-2005
  • American Diabetes Association, Board Member for the Mountain States Regional Board (Arizona, New Mexico, Colorado, Utah, and Wyoming), 1997-2002
  • Arizona School for the Arts (Charter School), Member, Board of Governors, 1997-2001
  • Arizona School for the Arts (Charter School), President, 2000-2001
  • Arizona School for the Arts (Charter School), Secretary, 1998-2000
  • American Diabetes Association, Arizona Affiliate Board Member and Chair, 1994-1997


  • J.D., Brigham Young University, Cum Laude, 1976
  • B.A., Brigham Young University, Economics with Honors, 1973

AV®, AV Preeminent®, Martindale-Hubbell Distinguished SM and Martindale-Hubbell Notable℠ are Certification Marks used under license in accordance with the Martindale- Hubbell® Certification procedures, standards, and policies. For more info please visit:

Daniel Mestaz

Daniel Mestaz

With a string of successes over twenty-plus years, Daniel is as fierce as they come. His clients describe him as an approachable, easy going guy who relentlessly goes for the win.

Daniel is approachable because he can talk to anyone. You will feel comfortable in his presence because he will explain your options in plain English. Yet his opponents soon realize, particularly when their client is under oath, that this Clark Kent turns into Superman in the court room.

Daniel is an AV-rated trial lawyer with over twenty years of experience in commercial litigation, including cases involving business divorce, breach of contract, business torts, trade secrets, non-compete/non-solicitation covenants, and unfair competition. He has tried dozens of cases to courts and juries. He has particular expertise in electronic discovery. Daniel and his e-discovery team use the latest technology to efficiently gather, filter and use — to the client’s benefit — the electronic evidence important to the case, without getting mired in irrelevant details. And by doing the e-discovery in house, firm clients save thousands of dollars that would otherwise go to outside vendors.

As a trial lawyer, Daniel is nimble, aggressive, and always ready. He knows that the key to victory is mastering the facts and evidence so that no matter what happens, he can put the key piece of evidence on a screen within seconds. Smooth and seamless. No fumbling. No delays. You would be hard pressed to find someone as thorough and prepared as Daniel.

Daniel went from a top six law school to nine years at blue-chip law firms in Los Angeles. As a BigLaw commercial litigation partner, he represented fortune 100 corporations in massive cases with hundreds of thousands, sometimes millions, of documents.

He resigned that lucrative partnership because he wanted more jury trials, so he moved to Arizona to try serious felony cases for several years. Later, Daniel met Daryl Williams and realized that Daryl’s Chron was the holy grail of trial tools. They joined forces and Daniel has not looked back. Daniel Mestaz is a true professional with the skill and experience to take care of you and your company.

Read more about how Daniel wins cases here.


Bar Admissions & Education

  • Arizona State Court
  • California State Court
  • U.S. District Court, District of Arizona
  • U.S. District Court, Central District of California
  • U.S. District Court, Northern District of California
  • U.S. District Court, Southern District of California
  • U.S. District Court, Southern District of Texas
  • United States Court of Appeals, Ninth Circuit
  • J.D., New York University, 1996
  • B.A., University of Southern California, 1993

AV®, AV Preeminent®, Martindale-Hubbell Distinguished SM and Martindale-Hubbell Notable℠ are Certification Marks used under license in accordance with the Martindale- Hubbell® Certification procedures, standards, and policies. For more info please

John Arriola

 John Arriola

John M. Arriola is an associate at Williams|Mestaz. Born and reared in Phoenix, Arizona, John obtained his undergraduate degree in finance from Arizona State University. He went on to study law at the University of Arizona, James E. Rogers College of Law, where he received a full-tuition scholarship. In law school, John served as an extern for a federal magistrate judge in Tucson, as well as a licensed student attorney in the Pima County Attorney’s Office misdemeanor office. Since becoming an attorney, he has focused his legal career on commercial practice.

John grew up in a legal family. His mother is a retired Maricopa County Superior court Judge, and several of his relatives are current or former attorneys. John understands litigation can be daunting, and he knows the difference that quality legal representation can make. He is honored to be working at a firm with a proven track record of success.

John has spent time living in China and is conversationally fluent in Mandarin. As a native of Arizona, he is enamored with the beauty of the desert. He often runs the local trails, and at least once a year visits the Grand Canyon for a rim to rim hike.

Bar admissions

Arizona State Court
U.S. District Court, District or Arizona


J.D., University of Arizona, 2019
B.S., Arizona State University, Finance, 2010

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The information you obtain at this site is not, nor is it intended to be, legal advice. You should consult an attorney for advice regarding your individual situation. We invite you to contact us, though doing so does not create an attorney-client relationship. Please do not send any confidential information to us until such time as an attorney-client relationship has been established. Our description of what we believe to be superior technology and how we win cases reflects our typical approach to litigation, which we believe:  (i) gives us a competitive advantage, and (ii) is responsible for any success we have had. But we do not win every case. Other lawyers may have technology or approaches that they believe gives them an advantage. Also, the results that we have obtained in other cases or that are described in our clients’ testimonials do not guarantee, promise, or predict the outcome of your case, which depends on the law, facts, and evidence specific to it.