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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Olivia A. Esser

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Debra O’Brien

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Olivia is an associate attorney in DeWitt’s Trusts & Estates and Business practice groups. Her practice focuses on estate planning, probate, and trust administration, as well as business transactions and real estate. Olivia is committed to helping a wide variety of families, individuals, and entities create comprehensive estate planning and succession strategies to meet each client’s unique needs.

In developing relationships with clients and assisting them in achieving their goals, Olivia strives to offer top-quality legal service. She values building strong communication with clients and using her varied experience to provide efficient and effective resolutions. Prior to joining the firm as an associate attorney, Olivia worked on variety of legal matters as a law clerk at DeWitt.

During law school, Olivia gained insight into navigating difficult legal challenges while working for the Oxford Federal Project. She also served the as the Senior Managing Editor for the Wisconsin Law Review and competed for the Wisconsin Law School’s Moot Court Board.


  • Former Senior Managing Editor of the Wisconsin Law Review – University of Wisconsin Law School
  • Former Moot Court Executive Board Member – University of Wisconsin Law School


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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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