NRC Postdoctoral Research Associateships - Open to U.S. citizens (non-citizen postdocs, see Foreign Guest Research below). Candidates and their research proposals are evaluated in a competitive process managed by the National Research Council (NRC) Associateship Programs. Application deadlines are typically February 1 and August 1. These two-year postdoctoral appointments commence within one year of selection. Areas of interest include but are not limited to the topics described below.