This study describes the history of the Environmental Protection Agency and National Institute of Environmental Health Sciences Libraries Internship Program contracted through the University of North Carolina's School of Information and Library Science. It also explores former interns' current careers and their perceptions of how the internship affected their careers. Historical information about the internship program was gathered through a review of historical literature and interviews with individuals who played key roles in the internship program over the years. Information regarding former interns' careers and perceptions of the internship program was gathered through a web-based survey. The findings of this study are useful in documenting the history of a program that has played a major role in the School of Information and Library Science at the University of North Carolina at Chapel Hill. Results of the web-based survey indicate that the majority of interns felt very positively about their experiences as interns. More than two-thirds of respondents believed the internship program had either a strong impact or very strong impact on their careers.