Polsinelli P.C. added Michael Ostermeyer and Karen DaCosta Perzan as shareholders in the real estate practice group.Ostermeyer practices on guiding public development and public infrastructure projects and developing commercial, institutional and industrial realty.Perzan practices on property acquisitions and dispositions, tax-assisted development, real estate finance, commercial leasing arrangements and zoning issues.They were previously with Quarles & Brady LLP in Milwaukee.