About Our Law Firm For nearly 100 years, the personal injury lawyers and legal staff at Sigman, Janssen, Sewall, Pitz & Burkham have been presenting effective and convincing cases on behalf of Wisconsin residents just like you. Whether you were injured in an auto accident, work accident, or any other type of accident, or are seeking Social Security Disability benefits, our experienced attorneys are here to help. Continue reading to learn more about us and what we stand for.