Sheldon T. Zenner

Sheldon T. Zenner: White-Collar Defense Attorney in Chicago

Sheldon T. Zenner brings nearly four decades of unparalleled experience to every case, seamlessly blending a distinguished career as a federal prosecutor with extensive defense representation. He’s renowned for expertly navigating complex, high-stakes matters, including government and internal investigations, regulatory proceedings, all phases of criminal litigation, and related civil disputes. Mr. Zenner’s client roster is diverse, encompassing corporations, high-ranking executives, and company owners across key industries such as financial services, healthcare, and entertainment. Crucially, his representation extends far beyond traditional legal advice; he provides critical business insights, operational assessments, strategic counsel on public scrutiny and reputational risk mitigation, and a holistic understanding of the challenges faced by clients with significant business or livelihood interests on the line.

The cornerstone of Sheldon Zenner's white-collar defense practice is his seven years as an Assistant U.S. Attorney in Chicago, where he prosecuted hundreds of high-profile criminal cases and supervised junior line prosecutors. This prosecutorial background provides him with a uniquely valuable perspective – he anticipates the government’s strategy with remarkable accuracy and informs his defense approach with an astute understanding of investigative techniques and potential legal arguments. Despite his rigorous approach, Mr. Zenner favors a strategy of reasoned negotiation and collaboration whenever possible, seeking common ground and reasonableness over confrontational tactics. This nuanced defense style has proven remarkably effective, even in situations where the government has pursued aggressive legal action.

A particularly notable case illustrates Mr. Zenner's skill and determination. When 100 federal agents executed a massive search of a client’s headquarters, seizing millions of dollars in products and conducting extensive interviews, Mr. Zenner immediately responded. He not only helped control the situation and calm employees but also skillfully negotiated with government prosecutors and addressed the media, skillfully managing the public relations aspects of the situation. Over the following year, he engaged in extensive discussions with the prosecutors, presenting a detailed legal analysis that ultimately persuaded them to decline prosecution and return the seized assets without filing charges – a testament to his strategic thinking and persuasive abilities.

While he is equally adept at litigating cases to their fullest extent, Mr. Zenner’s primary goal is always to avoid prosecution. He’s demonstrated this repeatedly, most famously by successfully convincing the government to abandon the first federal criminal computer-hacking prosecution after a damaging cross-examination of the government’s expert witness. Many of his cases involve alleged violations of antitrust, securities, tax, FCPA, or anti-fraud laws, reflecting his broad expertise. Recognizing the international nature of his clients’ businesses, Mr. Zenner frequently works across borders, conducting investigations and advising clients in jurisdictions including China, Japan, Brazil, South Africa, and numerous European countries.

Beyond advising on government inquiries, Mr. Zenner plays a vital role in helping clients proactively address potential issues. He assists in conducting internal investigations into suspected wrongdoing and provides strategic guidance on how to respond effectively when clients have been victims of white-collar crime. This comprehensive approach, combined with his decades of experience, instills confidence in his clients that they are represented by counsel capable of addressing any challenge that arises. Sheldon Zenner’s dedication and results-oriented strategy are recognized throughout the legal community.

Practice Areas

• Criminal Defense
• White-Collar Defense
• Internal Investigations
• Regulatory Proceedings
• Qui Tam/False Claims Act Defense
• SEC Enforcement
• Securities Fraud Defense
• Antitrust Litigation
• Tax Litigation
• FCPA Compliance
• Civil Litigation

Awards & Recognition

• Recognized in Best Attorney USA since 1997
• Legal Assistance Foundation Champion For Justice Award 2010

Education & Credentials

• Bar Admissions: Illinois
• Experience: 7 Years as Assistant U.S. Attorney, Chicago
• Expertise: White-Collar Criminal Defense, Government Investigations, Regulatory Compliance