Branch Address - Northbrook Suite B, 1808 Janke Drive Northbrook 60062 P: 224-723-5540 Get Directions Local Contacts Rick Aiello Senior Vice President Great Lakes Phone: (708) 377-5705 rick.aiello@gdi.com Ms. Mary Swietlik Operations Manager, Northern Illinois & Wisconsin Phone: 847-296-5421 mary.swietlik@gdi.com Ms. Julie Rangel Phone: 708-438-4470 julie.rangel@gdi.com Kevin Lhota Vice President of Business Development Phone: (708) 613-2164 kevin.lhota@gdi.com