Attorney Kellen O’Brien is a graduate of the University of Colorado Law School. Before joining Madden Law Group in 2017, he clerked for a trial judge in Milwaukee and for the Wisconsin Court of Appeals. Kellen is licensed to practice in Wisconsin, and he represents clients before municipal and administrative courts. He is dedicated to achieving his client’s goals and helping them solve whatever problems require his assistance.

Kellen’s practice is focused on family law, civil litigation, and providing counsel to companies. His family law practice includes representing men and women in divorce, child support, maintenance, property division, and post-judgment actions. He provides skilled counsel to help people navigate through the challenges and disputes that arise during and after divorces. Kellen also represents individuals and entities in business disputes, construction litigation, employment law, real estate, collections, and other disputes that require legal assistance. He is skilled at reviewing and drafting business agreements so that companies can spend more time on what they do best.

Kellen is a proud alumnus of the University of Wisconsin and native of the Badger state. He dedicates time to several legal and community organizations, and he is President of the Dodge County Bar Association. When he is not working, he likes to spend time outside biking, paddling, and skiing.

Kellen J. O’Brien


Phone: 920.387.2300


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