Mackall, Crounse & Moore, PLC has joined Dewitt Ross & Stevens S.C.

The newly formed DeWitt Mackall Crounse & Moore S.C. will provide clients with enhanced legal services
and efficiencies as well as access to more than 100 attorneys practicing in nearly 30 areas of
law in Wisconsin and Minnesota.

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Thomas D. Zilavy

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Sonja Foldvari

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Often sought by corporate leadership for his balanced advice, Tom concentrates his practice on several areas of business law, including financial institutions, commercial and real estate transactions, corporate and tax law, exempt organizations, estate planning, and government regulatory matters.

For more than 40 years he has maintained a stead fast commitment not only to his career but also to the community. He has donated his services to countless organizations because he believes every lawyer has a duty to serve the public interest. A few of the organizations Tom has been involved with include the United Way, Big Brothers, Planned Parenthood and Grace Episcopal Church. Whether serving as a director, trustee or officer, his contributions to community organizations are commendable.

Again, reflecting his commitment to the community, during the early years of his career, Tom helped the State Bar to lobby the Wisconsin Legislature to adopt one of the first child abuse laws which required teachers and others to notify authorities if child abuse was suspected. More recently, for more than seven years he was the Chair of the State Bar’s Unauthorized Practice of Law (UPL) Committee. In that capacity he was able to assist in convincing the Supreme Court to adopt a court rule defining what constitutes unlawful practice of the law in order to protect the public and create methods to deal with those doing so.

Although Tom is in phased retirement, he continues to faithfully serve his long-time business and individual clients and also assists new clients in locating the DeWitt lawyer that best meets their needs.


Tom represents a wide variety of clients ranging from small businesses, manufacturers and international businesses to financial institutions and charitable organizations. He has also represented a fair number of individuals in connection with a variety of legal problems.

Notable Representations

  • General counsel for a large charitable foundation's representation before the IRS; tax exempt determination letters from IRS; structuring charitable gifts

  • Sale and purchase of business; liquidation

  • General counsel for manufacturing business with national or worldwide operations

  • Commercial real estate sales and purchases

  • Drafting complex commercial contracts

  • Counsel to financial institutions for regulatory matters, secured lending, and trust department operations

Articles / Presentations

Tom has published articles in Wisconsin Lawyer and given presentations to the State Bar of Wisconsin on the topic of Unauthorized Practice of Law (UPL) in Wisconsin. He has also presented numerous seminars to the State Bar of Wisconsin on the Uniform Commercial Code. For Production Credit Associations of the Midwest, he presented seminars on agricultural lending practices.

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Get to know us

DeWitt LLP is one of the ten largest law firms based in Wisconsin, with an additional presence in Minnesota. It has more than 130 attorneys practicing in Madison, Greater Milwaukee, Green Bay and Minneapolis in over 30 legal practice areas, and has the experience to service clients of all scopes and sizes.


We are an active and proud member of Lexwork International, an association of mid-sized independent law firms in major cities located throughout the Americas, Europe and Asia and an active member of SCG Legal, an association of more than 140 independent law firms serving businesses in all 50 state capitals and major commercial centers around the world.


Best Lawyers 2013 – 2021
Super Lawyers 2021
Compass Award 2012
Top 100 Lawyers: National Trial Lawyers Association


While we would like to hear from you, we cannot represent you until we know that doing so will not create a conflict of interest. Accordingly, please do not send us any information about any matter that may involve you until you receive a written statement from us that we represent you (an “engagement letter”). You will not be a client of the firm until you receive such an engagement letter.

The best way for you to initiate a possible representation is to call DeWitt LLP at 608-255-8891. We will make every effort to put you in touch with a lawyer suited to handle your matter. When you receive an engagement letter from one of our lawyers, you will be our client and we may exchange information freely.

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