Mayer Brown

Partner

Greg Deis is a former Assistant U.S. Attorney who currently serves as global co-chair of Mayer Brown's Global Investigations & White Collar Defense practice and co-leader of Mayer Brown’s Litigation & Dispute Resolution Practice in Chicago. Greg regularly represents clients in high-stakes criminal and regulatory investigations and complex civil litigation. A Fellow of the American College of Trial Lawyers, Greg is a seasoned trial lawyer, having served as lead trial counsel in numerous civil and criminal trials and arbitrations.

Greg has been recognized as a leading lawyer by Chambers USA since 2019. In Chambers USA 2021 clients note that he is "super personable, good in court and…an excellent investigator – a truly terrific lawyer” with an “incredible balance of intelligence and patience – he exudes calmness." Greg is also recognized in Legal 500 USA with one client commenting: “Greg Deis is a standout. A skilled advocate and counselor.” Lawdragon 500 has also recognized Greg as a leading litigator in the U.S.