He earned his Ph.D. at Michigan State University, and M.S. and B.S. degrees at Brigham Young University. He previously worked as an Extension Weed Specialist for the University of Nebraska-Lincoln. At WIU he teaches several classes, including Principles of Crop Science (AGRN 176), Integrated Pest Management (AGRN 373), Weed Science (AGRN 479), Diseases of Economic Plants (AGRN 374) and Field Crops of the Midwest (AGRN 377). He advises the Agronomy Club and coaches the WIU Weed Science Team. Mark directs agronomy operations at WIU's Agricultural Field Laboratory where he conducts research on weed management in corn and soybean and evaluates herbicides and adjuvants for crop safety and weed control efficacy.