Vivanco Law LLC, a Chicago family law firm, specializes in resolving complex family law matters including divorce and dissolution, allocation of parental responsibilities (child custody), parenting time, support, post-decree enforcement and modification, and prenuptial and postnuptial agreements. We represent clients in collaborative divorce (an out of court, team based approach), mediation, and litigation where needed.

Kathryn McMahon Vivanco is the founder of Vivanco Law. Kate has worked exclusively in family law since the start of her legal career. Kate is passionate about helping her clients successfully navigate the divorce and separation process through cooperative processes such as collaborative law, mediation, and settlement as well as through litigation when needed.
Prior to founding Vivanco Law, Kate was a partner at a prominent family law firm in Chicago and she later co-founded a family law firm where she gained extensive experience in resolving complex family law matters for over a decade. Kate understands that every family’s situation is unique, and she works with each client to determine a strategic approach based on the client’s goals and interests. Kate handles every engagement with empathy, compassion, and focused attention to detail.
In law school, Kate received a certificate in tax law where she focused her studies on family law, taxation, and trust and estate planning. In addition, she gained litigation experience in Illinois state court as a judicial extern for the Honorable Donald J. O’Brien, Jr. (retired), Circuit Court of Cook County, Law Division, and in federal immigration court as a legal intern at the United States Department of Homeland Security, Immigration and Customs Enforcement, Office of the Chief Counsel.
Illinois 2012
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