Dr. Largen attended the University of Virginia as an undergraduate, double majoring in Biology and Environmental Science. She began her graduate studies at the University of Georgia in the Plant Pathology master's program. Her Ph.D. research dealt with the cumulative impacts of the insecticide diflubenzuron on deciduous forest litter arthropods. Dr. Largen spent two college summers employed as a Biological Aide with the U.S.D.A. Forest Service Regional office of Forest Insect and Disease Control. During this time she gathered data from federal lands in the southeastern U.S. on white pine blister rust, sand pine root decline, and air pollution damage to white pines. She also served in the U.S. Peace Corps in Niger, West Africa, as an Agricultural Extension Agent participating in research on crop insect and disease problems. For 18 years, Dr. Largen served as the Gypsy Moth & Mosquito Control Branch Chief for Prince William County government in Virginia. She was responsible for developing and implementing public education and notification projects, insect population surveys, aerial assessment of tree defoliation, ground and aerial application of insecticides, and environmental monitoring of insecticides. Dr. Largen serves as the coordinator for the EVPP 110 and EVPP 111 courses at GMU.