Dr. McCall was a member of the faculty in the College of Veterinary Medicine at the University of Georgia from 1970 to 2006, retiring as Professor Emeritus of Veterinary Parasitology. For more than three decades, he has been President/Chief Operations Officer of TRS Labs Inc., a contract research laboratory. He is past vice president and editor of the American Heartworm Society and currently serves as associate editor. He was the UGA Director of the National Institutes of Health-funded Filariasis Research Reagent Resource Center from 1973 to 2006. He has published more than 250 peer-reviewed research articles, 50 non-refereed research articles, and 11 book chapters, presented more than 300 lectures, and co-written more than 250 scientific papers and abstracts for scientific meetings.