His scholarship includes research on the feminization of labor migration, transnational identity, and social networks. His recent projects have included studies of transnational Mexican communities, Filipino factory workers in Taiwan, and homeless youth in the United States. All of his current projects incorporate the methods of visual sociology including photo elicitation, photovoice, visual ethnography, and production of collaborative video documentaries. Dr. Sills holds a PhD in Sociology from Arizona State University with concentrations in Methods and Globalization. While attending Arizona State he took an advanced course on Visual Methods from Eric Margolis, current president of the International Visual Sociologists Association. This course led him to his first documentary project in 2002 entitled Street Life.