William Halaz III - Cordell & Cordell Missouri Divorce Lawyer

William Halaz III

Senior Lead Litigator

Chesterfield divorce attorney William J. Halaz IIIWilliam J. Halaz III said being able to help a father claim his rights with regard to custody of a child is one of the more enjoyable parts of being a family law attorney.

“It’s rarely an ideal situation; just a father trying to do the right thing,” he said of these cases.

In order advocate for a client’s best interests, Mr. Halaz said open lines of communication between an attorney and client is key.

“If a client is not open and honest with you it’s difficult to prepare and represent their interests as fully as possible,” he said. “You need to develop a relationship with them so that way we can both trust each other and present their case the best way possible.”

Mr. Halaz said patience is the most important trait to have during a family law case.

“This area of law is wrought with emotion, and rightly so,” he said. “However, keeping a cool head when things get heated can be invaluable.”

Licenses & Admissions

Mr. Halaz is licensed to practice in the state of Missouri.


Mr. Halaz received his bachelor’s degree in Political Science from Southeast Missouri State University. He received his Juris Doctor from Saint Louis University School of Law.

Professional Experience

While in law school, Mr. Halaz was a Rule 13 Attorney for the Juvenile Courts, and worked for the Law Clinic of Saint Louis University in the family law section.


Mr. Halaz currently is a member of the Missouri Bar Association and St. Louis County Bar Association.


Mr. Halaz was recognized in 20152016, 2017, and 2018 as a Missouri Rising Star in the family law practice area by Super Lawyers, a Thomson Reuters rating service of outstanding lawyers.

Speeches, Seminars, & Publications

Mr. Halaz has written many articles on divorce on DadsDivorce.com. He also authored the article, “Role of Religion in Custody Disputes: A Missouri Case Study.”

Watch Mr. Halaz’s lecture from Cordell & Cordell’s 2018 Continuing Legal Education seminar on “A Circus Act – Juggling the Directions, Comments, and Assumptions of the Updated Form 14.”

Watch Mr. Halaz’s lecture from Cordell & Cordell’s 2017 Continuing Legal Education seminar on “Re-creating a relationship: Co-parenting counseling and changing the dynamics within post-dissolution families.”


Mr. Halaz is a coach for a youth basketball team, enjoys cycling and camping.


"Will has been very helpful. He has made my life easier these past few months.  I will sometimes call with odd questions but he is always responsive. High kudos to him."
"I told Will that I have never had such a positive customer service experience, and I can not believe it is coming from a law firm. Whoever keeps it running or has come up with the process is doing a great job. I was blown away! I did not want to be divorced but you all definitely made the process easier. Awesome! Keep up the good work."
"I worked with William Halaz and [his paralegal] and they were both wonderful and did a great job! I only wish I'd used your services earlier. ... William always returned my calls and emails right away."
"Will did a great job on everything I asked of him."
"Will did an exceptional job as my attorney. He provided sound advice throughout the process and gave good information as to what to expect, which is so important given there are so many unknowns. Again, he did a very good job..."
"I am a fan of both Will and your firm. The speed, professionalism and attention to detail in which my case is being handled has really won me over. I can't be happier with the legal services that I am receiving right now."
"Will is providing me with excellent service and representation. I have no problems or issues. Will gets back to me very quickly and is able to answer my questions and give me good, solid advice. Things are moving well, I think, and I am happy with Cordell & Cordell and am glad I have your firm on my side."
"William is very responsive and knowledgeable. His advice on the jurisdiction and other complexities of my case has been very helpful. William has done a great job dealing with the legal oddities of my case and has done very well managing my expectations and communicating with opposing counsel."
"Will Halaz took on a really tough case more than halfway through the process. He always listened to my concerns and kept my desired outcome in mind. Will was also great at providing me with a realistic view of my case and outcomes. He was always professional but personable at the same time. I truly appreciate all of his time, help, and advice!"
"Will has been fantastic! If I message him, he calls back within a few hours. I couldn't be more pleased with the work he's done so far."
"Will was a great lawyer for me because of how fast he was able to get everything done."
"William has given more than I could have ever expected or imagined. He's doing amazing."
"Will seems to be working diligently to answer all my questions."

"I am very pleased working with Wil. I truly believe in the end, even though it cost a lot up front, Wil really saved me in the long run. I have been very pleased with his work! I have already referred a friend to Wil and will continue to do so. I think Wil is a great guy. You all are lucky to have someone like Wil!"


​"Wil was great! He was very personable. He was always willing to answer any questions I had, no matter how ridiculous they seemed. I will likely use Wil again here in the very near future."


William was very professional and what impressed me the most was his punctuality in corresponding with me.

​"William is superb! He gives great advice and always listens. He always explains things to me. Any time I have a question, all I have to do is call. He's fantastic. He's a gentlemen and a great attorney, one of a kind! I always know I can trust him and that is key!"
"​Will is awesome about communication. Will does an amazing job in understanding my situation and communicates it very well to the judge. Cordell has been absolutely top notch amazing."
"William was always very responsive to any of my issues no matter what time or if it was outside of working hours."
"Will had laser focus and would effortlessly address the key issues.  I was especially impressed by the way he deconstructed what the respondent was representing to the court.  He has captivated me during this entire process and he has helped me weather the storm. William treated me like I was his brother. William clearly had a sterling upbringing and a strong desire to help people. He is a lawyers lawyer. I am sure that his superiors already know everything that I have said.  To include his devotion to God, his wife, and children."

*Check out more Cordell & Cordell reviews of William and the rest of our Missouri attorneys.