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Stephen Cowen has extensive experience as both outside and in-house counsel advancing the interests of clients in cutting edge industries on strategic and bet-the-company matters. He represents clients in high-stakes trials and appeals; complex business, accounting, and intellectual property disputes; and internal and government investigations involving highly sensitive topics and crisis management. In representing clients in these matters, he routinely counsels and presents to senior management and boards of directors.

As a former senior counsel in The Boeing Company's law department, Stephen held a wide range of responsibilities. He served as the lead lawyer for Boeing's HorizonX innovation and venture capital unit, where he advised on investments in artificial intelligence, mobility, and autonomous technologies. He also managed litigation and investigations across the aviation, defense, space, and cyber sectors, as well as global supply chains. Prior to Boeing, Stephen was in private practice at a law firm in Chicago, where his clients included pharmaceutical, medical device, life science, health care, tech, finance, and manufacturing enterprises across a wide range of matters that included complex business disputes and mass torts.

Prior to entering private practice, Stephen clerked for Justice Anthony M. Kennedy at the U.S. Supreme Court and Judge Douglas Ginsburg at the U.S. Court of Appeals, D.C. Circuit. A former intelligence officer in the United States Navy Reserve, Stephen deployed to Afghanistan in Operation Enduring Freedom. Since 2012, he has taught a seminar at the University of Chicago Law School on constitutional law relating to national security.


  • Major American manufacturer reviews PREP Act immunityJones Day advised a major American manufacturer during the COVID-19 pandemic on obtaining immunity from liability for the manufacture and distribution of covered countermeasures under the Public Readiness and Emergency Preparedness Act (PREP Act).
  • Global manufacturing company responds to disclosure of potential vulnerabilities in its productsJones Day led a global manufacturing company's response to the disclosure of potential vulnerabilities in its products.
  • Hospital system conducts investigation of circumstances leading to criminal prosecution of employeeJones Day was retained by a multi-state health care system to conduct an investigation and advise the board regarding the practices of hospital staff and leadership regarding a sensitive issue that resulted in a criminal prosecution of an individual who worked at the hospital.
    • January 29, 2019
      Navigating High-Profile Disputes with Company Executives: Key Decision Points for In-House Counsel