Dan Colley is an immunoparasitologist with extensive public health experience, he recently directed the Schistosomiasis Consortium for Operational Research and Evaluation (SCORE), a 10-year operational research program to provide the schistosomiasis community with an evidence base for control and elimination of the disease. Dr. Colley was at Vanderbilt University School of Medicine and the VA Medical Center in Nashville for 22 years, Director of the Division of Parasitic Diseases at the US CDC for 9 years, and Director of the Center for Tropical and Emerging Global Diseases at the University of Georgia (UGA) for 15 of his 19 years at UGA. He had long-term, highly productive multi-year research collaborations on the immunology of schistosomiasis in Brazil, Egypt, Kenya and St. Lucia. In Brazil he also worked on Chagas disease and in Egypt he also worked on trachoma. He has received numerous national and international awards and is a past-president of the American Society of Tropical Medicine and Hygiene. Dr. Colley has published ~ 300 papers or chapters, and has been fortunate to have had many outstanding students, post-docs, fellows on sabbatical, technicians and colleagues. After 50 years of “chasing schistosomes” Dr. Colley retired in July, 2020 and is currently Emeritus Professor of Microbiology at UGA.