About David B.
David B. Sosin built a legal basis in classroom and courtroom over decades. He earned a Bachelor of Science in finance from the University of Illinois–Chicago in 1968 and completed his law degree at Northwestern University in 1972. Those educational years preceded a long profession spanning state and federal courts.
Early in his career he moved into practice throughout Illinois. Over time he obtained admissions that broadened his reach: he is approved to practice in Illinois, Indiana and Wisconsin, and he holds admission to the Seventh Circuit and the United States Supreme Court. Those credentials have allowed him to handle things that require appearances at both trial and appellate levels.
Sosin has been lively inside bar organizations in addition to on the company desk. He serves at the Board of Governors of the Illinois State Bar and has held the office of Treasurer of the same organization in the beyond. He is a director at the ISBA Mutual Insurance Company and keeps membership in the DuPage County Bar Association. He also participates as a state-wide delegate for the Asian American Bar Association of the Greater Chicago Area and has held leadership roles within the Southwest Bar Association.
His professional lifestyles consists of a long affiliation with the firm Sosin & Arnold & Shoenbeck Ltd., where he has practiced along colleagues on a range of civil things. The company listing accompanies his name on filings and courtroom dockets. Over the years he has treated litigation that required coordination throughout jurisdictions and courts, typically bringing cases earlier than appellate panels.
Colleagues describe him as steady in court and methodical in preparation. He has mixed courtroom experience with involvement in bar governance, which has stored him connected to changes in practice rules and expert requirements. That mix of courtroom work and organizational service has featured over the course of his career.
As of 2026 he remains lively in practice and continues to appear in state and federal things, which includes instances in the Seventh Circuit and things that require highest court admission. His recent practice concentrates on legal proceedings across state and federal courts and on things that involve appellate advocacy.
