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William Halaz III

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William Halaz III
Litigation Partner

About William Halaz III, Litigation Partner

William 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 to advocate for a client’s best interests, Mr. Halaz said open lines of communication between an attorney and client are 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.”

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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.


Mr. Halaz has written many articles on divorce on 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 appeared on KMOV’s Great Day to provide back-to-school tips for separated families.


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

Real-Life Experiences
Reviews from Our Past Clients
“It took years for me to come to a decision to end my marriage. I sought a law firm that is focused and prepared for trial if need be, and seeks to give me the best outcome possible. Cordell and Cordell has performed very well and is very supportive during this difficult time. I have full confidence in my representation and recommend them.”
– Mason B.
“Divorce is hard enough without trying to find a Lawyer who will truly work for you. I had several conversations with Lawyers that seemed only interested in winning somehow. No one wins in a divorce. I should have went to Cordell & Cordell first so I would have avoided a lot of headaches. I met a group of people that genuinely care for you.”
– Mark L.
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