In the USA, graduates of environmental health sciences, including those with a major in exposure or risk assessment, are currently in high demand. In recent years, they have been hired to work in the industry and at a variety of federal, state, and local health and environmental regulatory agencies.

The National Exposure Research Laboratory (NERL) is part of the USEPA's Office of Research and Development, with research divisions located in several cities. NERL's Human Exposure Research Branch is located in Las Vegas, Nevada. That Branch's research activities include: dynamic exposure assessment; pharmacokinetic modeling; dermal exposure and dose modeling; human activity pattern surveys; and techniques for immunoassay.

In the 2 March 2001 issue of Science (and perhaps in other places as well), NERL placed a full-page announcement seeking candidates to fill as many as 32 four-year post-doctoral research positions in human health exposure. Selected candidates will conduct research in environmental monitoring and characterization; computer modeling of the transport, transformation, and fate of pollutants in multiple media; and human and ecological exposure analysis.

Almost on an annual basis, the National Center for Environmental Assessment of USEPA's Office of Research and Development also seeks candidates to fill one or more post-doctoral positions for research work in three major areas: dose-response and exposure assessment methodologies; conducting health and ecological risk assessments of national significance; and providing guidance and support to risk assessors.