Welcome to the Zimmermann Family Law Firm.

We are a family law firm, and our goal is to help our clients through the process of divorce in a manner that is most conducive to their emotional and financial health, and minimize the trauma of the process on their family.

Whether you are seeking legal help with traditional divorce services, collaborative divorce, mediation, Guardian Ad Litem or family financial restructuring, give us a call. Zimmermann Law Office – The name to trust in family law.


Zimmermann Law Office was established by Karen Goldman Zimmermann, JD. She is a 1982 graduate of Marquette University Law School.  She focuses exclusively on family law. Such matters include divorce, both traditional and collaborative, paternity, custody, support and property division issues. Her practice is limited to Milwaukee, Ozaukee, Waukesha and Washington Counties. She is a member of the State Bar of Wisconsin and Milwaukee, Ozaukee, and Washington Bar Associations. Read More about Karen here.


Nathan Zimmermann, JD has been practicing in the bankruptcy and family law field since 2005. He has considerable experience with Chapter 7 and Chapter 13 bankruptcies, as well as dealing with debt renegotiation, foreclosures and creditors’ right. Read More about Nathan here.

Mari Zimmermann, JD is a 2011 graduate of Marquette University Law School. Mari represents clients in contested divorces, collaborative law cases, and mediation. Read More about Mari here.