Chicago Oak Brook 200 North LaSalle Street Suite 2400 Chicago, IL 60601 Phone: (312) 419-1700 Fax: (312) 419-1715 Directions (Click Here) Or CTA map (Click Here) 1111 West 22nd Street Suite 240 Oak Brook, IL 60523 Phone: (630) 472-1700 Fax: (630) 472-0083 Directions (Click Here)     Schaumburg   1051 Perimeter Drive Suite 1100 Schaumburg, IL 60173 Phone: (847) 413-9300 Fax: (847) 413-9456 Directions (Click Here)