An ORISE Postdoctoral Fellowship is available to work in the U.D. Department of Agriculture-Agricultural Research Service's Aflatoxin Biocontrol lab in Tucson, Arizona, USA. Initial appointment is for 1 year and will be extendable. Research Project: Aflatoxin, a mycotoxin produced by Aspergillus flavus and closely related fungi, contaminates crops and is a threat to food and feed safety. The overall research goal of the lab is to develop, improve, optimize, and disseminate aflatoxin biocontrol technologies to growers. The goal of the current project is to elucidate genetic and genomic traits associated with enhanced displacement of aflatoxigenic fungi by non-aflatoxigenic Aspergillus in soils and on crops that can be used for selection of superior biocontrol strains. Specifically, you will help utilize transcriptomics to identify changes in gene expression during competition between aflatoxigenic A. flavus and non-aflatoxigenic A. tamarii that are associated with different competitive outcomes under a variety of biotic and abiotic conditions. Anticipated outcomes of the project include criteria for selection of fungal genotypes that will be developed into new biocontrol products for mitigation of crop aflatoxin contamination. Eligibility: Participant should have (or be close to finishing) a Ph.D. which includes genomic or transcriptomic analysis. Knowledge of mycology or plant pathology is helpful but not required. This position is limited to U.S. citizens who have received their Ph.D. within 5 years of starting the position. Application process: Applications should be made through ORISE's Zintellect platform: https://www.zintellect.com/Opportunity/Details/USDA-ARS-PWA-2026-0138 Kenneth Callicott, Ph. D. Research Molecular Biologist Pest Management and Biocontrol Research Unit U.S. Arid Land Agrictural Research Center Agricultural Research Service 416 W Congress Ave, Tucson, Arizona 85716 w: (520) 848-4652 c: (520) 301-6887 Ken.callicott@usda.gov "Callicott, Ken - REE-ARS" (to subscribe/unsubscribe the EvolDir send mail to golding@mcmaster.ca)