Dennis joined The Kendeda Fund in 2017 and serves as the fund advisor for a variety of sustainability initiatives in the southeast. In 1978, Dennis co-founded Southface, an Atlanta-based nonprofit promoting sustainable homes, workplaces and communities. He ran the organization for 38 years, and under his direction Southface has become a trusted partner to federal and local governments, utilities, businesses and nonprofits, as well as a valuable resource to consumers.

Recognized as a national leader in sustainability, Dennis has received numerous professional awards, including the prestigious Hanley Award for Leadership in Sustainable Housing, the Argon Award for Leadership in Sustainability, the Energy and Environmental Building Alliance Legacy Award, the Residential Energy Services Network Leadership Award, and lifetime achievement awards from the Atlanta Business Chronicle, GreenLaw, Georgia Interfaith Power and Light, the Greater Atlanta Home Builders Association and Urban Land Institute, Atlanta District. He has been designated by Georgia Trend as one of the “100 Most Influential Georgians.”