Mark L. Gleason was born in New York, New York, in 1950, and was raised on Long Island. He graduated from Carleton College with a B.A. degree in biology in 1972. After obtaining M.S. and Ph.D. degrees in environmental sciences from the University of Virginia, he was a visiting assistant professor at Centre College, in Danville, Kentucky, from 1980 to 1982. He earned a second Ph.D. degree in plant pathology from the University of Kentucky in 1985. Since 1986, Dr. Gleason has been on the faculty of the Department of Plant Pathology at Iowa State University. He conducts research and extension programs on disease management of all horticultural commodities (fruits, vegetables, trees, ornamentals, and turfgrasses). Gleason’s research and extension program focuses on sustainable management of diseases of fruits, vegetables, and herbaceous perennials. He co-teaches four undergraduate and graduate courses: turfgrass integrated pest management, ecologically based pest management, integrated management of tropical crops, and sustainable horticulture. He was the feature editor of Plant Disease for 6 years (1994–2000) and is currently a senior editor of Plant Disease.