About Gray Design Group

Gray Design Group is one of the leading multi-disciplined architectural, interior, planning, branding and graphic design firms in the Midwest. With over 40 years of experience and thousands of successful projects, Gray continues to deliver exceptional, vibrant designs throughout the U.S. and abroad.

Robert Hartzog

Project Manager

Associate AIA

Rob has over 25 years of experience in architectural production on large scale and complex projects. He is proficient in utilizing BIM (Revit) and is able to multi-task on tight schedules and short deadlines. For Rob, his mission as an architect is to inspire, educate and craft beautiful solutions that bring each client’s ideas to life. He enjoys navigating complex problems and producing innovative yet practical solutions. When not in the studio, Rob enjoys spending time outdoors, photography and model building.


Creative. Collaborative. A Trusted Partner. The ‘Clear Choice’. Want to hear what else people say about their experience with Gray? Take a peek at some of our most recent client recommendations.