John Gregory Deis
as of 6/18/2026 5:48:51 AM
John Gregory Deis
Mayer Brown LLP
71 S. Wacker
Chicago, Illinois 60606-4637
(312) 701-8035
gdeis@mayerbrown.com
Date Admitted
April 23, 2003
Illinois Registration Status
Active and authorized to practice law
Malpractice Insurance
In annual registration, the attorney reported that the attorney, or the attorney’s firm, maintains malpractice insurance.