She joined the Villanova faculty in 1988 where she has taught continuously with the exception of a one-year Fulbright appointment at Qatar University. Dorothy has published in the areas of material treatments for improved hardness and electrical conductivity, graphite fiber production and nanofiber applications in catalysis and waste treatment, and value recovery from biodiesel processing wastes. She has several publications related to heterogeneous photocatalysis for waste treatment and/or value recovery and is currently working on a project for treatment of food processing waste. She has taught numerous undergraduate and graduate courses. Her main teaching assignments include undergraduate courses on separations and process design and graduate courses on separations and process safety.