As the Aquatic Invasive Species Applied Ecologist for The Nature Conservancy’s Great Lakes Project, environmental science grad Andrew Tucker ’04 protects the U.S. Great Lakes from harmful, foreign aquatic invasive species. By determining how to stop aquatic invasive species (AIS) from entering the Great Lakes, detecting the AIS’s previous introductory locations to prevent their spread, and controlling established AIS to minimize their impacts on the ecosystem, Tucker uses his Messiah College education to save the world one Great Lake at a time.