Dennis studied German, English and Russian in Kiel and Irkutsk. He finished his degree (M.Ed.) in 2017 with a master's thesis that approached the gothic and horror genres with queer theory. Before coming to Cornell, Dennis received a Fulbright Scholarship and worked as a Foreign Language Teaching Assistant at Dartmouth College. He is a co-editor of Closure. Kieler e-Journal für Comicforschung. Research interests include in comics studies, film and television studies, queer theory, and transnational studies.