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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David J. Hase

Greater Milwaukee
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Donna Winkler

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David is an attorney in the firm’s Brookfield office. He has a trial, arbitration and administrative law practice concentrating in general business litigation, securities, and regulatory matters before federal and state trial and appellate courts, administrative agencies and arbitration panels. He also practices in the area of school law representing school administrators, parents and students, charter schools and school districts.

For more than 25 years David has served as an arbitrator in securities law disputes. He continues to be a FINRA arbitrator, and often is appointed to chair arbitration panels. He has also arbitrated cases involving matters other than securities disputes.

Prior to joining DeWitt, David was a shareholder at another Wisconsin firm. He also has a background in government having served as legal counsel to the governor of Wisconsin and as Wisconsin Deputy Attorney General. He also served as an elected member of a Milwaukee area local school board.

He received his undergraduate degree from Dartmouth College where he was elected to Phi Beta Kappa. He earned his law degree with Order of the Coif honors from the University of Wisconsin-Madison where he served as Editor-in-Chief of Wisconsin Law Review.


  • Super Lawyers® in Wisconsin – Business Litigation (2005-201​9)

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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


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