At the Harvard Graduate School of Design, Dennis has taught a studio focused on the Boston Innovation District and in 2018, he taught in the Elements of Urban Design Studio. Dennis leads remarkable teams that have been honored with more than 75 design awards, including national recognition from the American Institute of Architects, the American Society of Landscape Architects, and the Society for College and University Planning. Dennis has been inducted as an honorary member of ASLA—a title bestowed upon only a handful of professionals nationwide. Dennis also served as the youngest president of Sasaki from 2004 until 2011.