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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Ma, Ph.D.
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Yanjun Ma, Ph.D.

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Yanjun joined DeWitt in April 2021 as a Registered Patent Agent. She works with patent attorneys and agents in the Intellectual Property Practice Group on drafting patent applications, responding to Office actions, and conducting patent analysis. Her technical expertise spans areas of molecular biology, microbiology, next generation sequencing, bioinformatics, environmental science, environmental engineering and soil science.

Prior to joining Dewitt, Yanjun worked as a Post-doctoral Research Associate on a variety of projects, which included applying transcriptomics, metabolomics, genetic modification, protein purification and enzyme activity assays to uncover microbial degradation pathway of aromatic compounds derived from lignin, developing kinetic models to simulate co-metabolism of aromatic mixtures by Rhodopseudomonas palustris, and applied high-throughput methods to quantify and profile microbial groups in agricultural soils that contribute to greenhouse gas emission. During her graduate studies, Yanjun’s research focused on using molecular biological tools to understand the fate and impact of emerging contaminants, which included tracking antibiotic resistance genes released to wastewater treatment processes and reclaimed waters, and analyzing toxicity of engineered metal and metal oxide nanomaterials on microbes and human cells.

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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.


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