About Gray Design Group

As a leading architecture, interiors and experiential graphic design firm in Saint Louis for over 40 years, we believe our integrated approach creates cohesive spaces that enhance efficiency and productivity while building meaningful connections and positive experiences.

Tobias Heddinghaus

Principal

AIA, LEED AP® BD+C, NCARB

As a Principal at Gray Design Group, Toby focuses on business development, cultivating lasting client relationships and advancing projects that balance design excellence with sustainability. Licensed in more than 40 states and credentialed with AIA, NCARB and LEED, he brings both technical knowledge and a practical mindset to every project. Designers value his attention to detail and ability to simplify complex challenges into clear, well-executed solutions. Toby’s approachable style and steady guidance inspire confidence in clients and motivate the professionals he mentors.

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Testimonials

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.