The USDA Agricultural Research Service Pest Management Research Unit in Sidney, MT is hiring a permanent Research Biologist, Molecular Biologist, Ecologist, or Entomologist (Pay: GS-12 to GS-15) responsible for planning, conducting, and reporting research to understand and describe the taxonomic identity, population genetics, origins, biogeography, and evolutionary relationships of invasive plant species and their candidate biological control agents and how these factors affect weed management. The overall goal is to lead to new management strategies addressing biological and cultural control of key weed pests in agroecosystems and natural areas. The incumbent will be expected to use molecular methods and analyses to elucidate biological, evolutionary and ecological processes that drive plant invasion and biological control success. The overall mission of the Research Unit is to develop and implement ecologically based strategies and technologies for the sustainable management of insects, beneficial organisms, pests, and weeds in crops and rangeland. For more information about research conducted in the unit visit https://www.ars.usda.gov/pa/nparl/pmru.