If you are interested in pursuing a position in Wisconsin, there are two websites that contain links to Wisconsin companies.
BioForward BioForward is a member-driven association with a mission to provide Wisconsin's bio industry with the support needed to flourish. Their website includes a searchable database of Biotech companies in Wisconsin and the surrounding area.
University Research Park - University of Wisconsin-Madison Their website includes a list of all the University Research Park tenants and their profiles. It also provides the option to search the tenants by category.