Contact Contact Us Get in touch with REX Engineering Group Naperville 280 Shuman Blvd Suite 108Naperville, IL 60563Phone: (630) 318-1725 Los Angeles 617 W 7th St Suite 500Los Angeles, CA 90017Phone: (323) 262-9199 Email REX Engineering engineering@rex.one REX Engineering HQ 280 Shuman Blvd., Suite 108 Naperville, IL 60563