Specializing in editorial and documentary photography of people and places, Marshall brings a revealing and sensitive eye to his subjects and has worked for a range of clients including magazines, non-profits, universities, design firms, and large multinational corporations. His images from Baltimore, Europe, India and Haiti have appeared in prestigious publications like Photo District News, Communication Arts, The Photo Review, The Sun Magazine, and Photographers Forum. He has also shown in numerous galleries and exhibitions including The Print Center in Philadelphia, The Fraser Gallery in Washington DC, Maryland Art Place, The Portland Museum of Art in Maine, and The Gordon Parks Exhibition in Kansas.