Allison Leach is a postdoctoral researcher with the UNH Sustainability Institute. She is a developer of the nitrogen footprint approach, and she led the integration of the nitrogen footprint into SIMAP. She currently works on SIMAP research & development. Prior to arriving at UNH, Allison was a researcher and graduate student at the University of Virginia where she developed the first-ever university level nitrogen footprint model. She holds a B.S. and M.S. in Environmental Sciences from the University of Virginia and a Ph.D. in Natural Resources and Environmental Studies from the University of New Hampshire. Her dissertation was titled "The Nitrogen Challenge: Footprints Tools and On-Farm Solutions."