According to our records, this business is located at 55 W Wacker Dr Ste 801 in Chicago (in Cook County), Illinois 60601, the location GPS coordinates are: 41.8864369 (latitude), -87.6298719 (longitude). O-Brien & O-Brien Atty is categorized under Law Firms and Law Offices (SIC code 8111). Known organization principal is Dominic Lupo. You can contact the company by phone at (312) 899-8390.