Denis is a tenured professor of photography at Rochester Institute of Technology. He has lectured internationally and presented workshops for Yellowstone National Park, Zion National Park, Florida A&M University, and SPEOS: Paris. He recently returned from a year abroad in Greenland, where he worked on a personal project through a National Science Foundation award.
Denis has participated in over 30 solo exhibitions in galleries, museums, and cultural centers. He has been widely published and produced advertising and editorial images for such clients as UNICEF, National Park Service, CocaCola, Polaroid, Delta Airlines, Eastman Kodak, and American Express.