With an extensive background in Environmental and Natural Resources Law, Legal History, Property Law, Water Law, and Environmental Law, Dr. Romero specializes in the legal history of the American West. His projects describe the history and current challenges on immigration, racial inequity, and water law and policy. 

During his career at the University of Denver, Dr. Romero directed the Interdisciplinary Research Institute for the Study of (In)Equality (IRISE). Dr. Romero is currently revising a book on the legal history of race and law in post-World War II Denver, Colorado. His scholarship works encompass the relationship between race and water law, school desegregation, property, land use, local government and urban development.